试用视觉搜索
使用图片进行搜索,而不限于文本
你提供的照片可能用于改善必应图片处理服务。
隐私政策
|
使用条款
在此处拖动一张或多张图像或
浏览
在此处放置图像
或
粘贴图像或 URL
拍照
单击示例图片试一试
了解更多
要使用可视化搜索,请在浏览器中启用相机
搜索优化
English
全部
Copilot
图片
灵感
创建
集合
视频
地图
资讯
购物
更多
航班
旅游
酒店
搜索
笔记本
安全搜索:
中等
严格
中等(默认)
关闭
筛选器
自动播放所有 GIF
在这里更改自动播放及其他图像设置
自动播放所有 GIF
拨动开关以打开
自动播放 GIF
图片尺寸
全部
小
中
大
特大
至少... *
自定义宽度
x
自定义高度
像素
请为宽度和高度输入一个数字
颜色
全部
仅限颜色
黑白
类型
全部
照片
剪贴画
素描
动画 GIF
透明
版式
全部
方形
横版
竖版
人物
全部
仅脸部
半身像
日期
全部
过去 24 小时
过去一周
过去一个月
去年
授权
全部
所有创作共用
公共领域
免费分享和使用
在商业上免费分享和使用
免费修改、分享和使用
在商业上免费修改、分享和使用
详细了解
清除筛选条件
购买 high gain antenna at 4:33 mhz
赞助
$381.99
3300-4200 Mhz| 2-Foot| 24 Dbi| Parabolic Dish Antenna| Vertical/Horizontal Polarized| 2 X N-Type Female Connectors
L-com Global Connectivity
$381.99
3300-4200 Mhz| 2-Foot| 24 Dbi| Parabolic Dish Antenna| Vertical/Horizontal Polarized| 2 X N-Type Female Connectors
L-com Global Connectivity
$52.99
27 Mhz Omni Antenna 4 Dbi Gain| Spring UHF Male Connector| Stainless Steel
L-com Global Connectivity
$52.99
27 Mhz Omni Antenna 4 Dbi Gain| Spring UHF Male Connector| Stainless Steel
L-com Global Connectivity
$121.99
900 Mhz 8 Dbi Flat Patch Antenna - 4ft SMA Male Connector
L-com Global Connectivity
$121.99
900 Mhz 8 Dbi Flat Patch Antenna - 4ft SMA Male Connector
L-com Global Connectivity
$295.99
3300-4200 Mhz| 1-Foot| 18 Dbi| Parabolic Dish Antenna| Vertical/Horizontal Polarized| 2 X N-Type Female Connectors
L-com Global Connectivity
$295.99
3300-4200 Mhz| 1-Foot| 18 Dbi| Parabolic Dish Antenna| Vertical/Horizontal Polarized| 2 X N-Type Female Connectors
L-com Global Connectivity
$720.00
3300-4200 Mhz| 17 Dbi| Sector Panel Antenna| 45 Deg. Slant Polarized| 4 X N-Type Female Connectors
L-com Global Connectivity
$720.00
3300-4200 Mhz| 17 Dbi| Sector Panel Antenna| 45 Deg. Slant Polarized| 4 X N-Type Female Connectors
L-com Global Connectivity
$17.99
4.5 Dbi Rubber Duck Antenna 2|400-2|500 Mhz RP-TNC Connector
L-com Global Connectivity
$17.99
4.5 Dbi Rubber Duck Antenna 2|400-2|500 Mhz RP-TNC Connector
L-com Global Connectivity
$66.99
900 Mhz 6 Dbi Yagi Antenna N Female Connector
L-com Global Connectivity
$66.99
900 Mhz 6 Dbi Yagi Antenna N Female Connector
L-com Global Connectivity
$970.00
406 Mhz - 512 Mhz 2 Folded Dipole Antenna| 7.6 Dbi Gain| 1/4 Wave Offset Pattern| V-Pol| Type N Female Connector
L-com Global Connectivity
$970.00
406 Mhz - 512 Mhz 2 Folded Dipole Antenna| 7.6 Dbi Gain| 1/4 Wave Offset Pattern| V-Pol| Type N Female Connector
L-com Global Connectivity
$92.99
698-960/1710-2700 Mhz 3/4 Dbi Omni Directional DAS Antenna - N-Female
L-com Global Connectivity
$92.99
698-960/1710-2700 Mhz 3/4 Dbi Omni Directional DAS Antenna - N-Female
L-com Global Connectivity
$201.99
900 Mhz 8 Dbi Omnidirectional Antenna
L-com Global Connectivity
2
$201.99
900 Mhz 8 Dbi Omnidirectional Antenna
L-com Global Connectivity
$39.19
900 Mhz 5Dbi Rubber Duck Antenna - SMA Male Connector
L-com Global Connectivity
$39.19
900 Mhz 5Dbi Rubber Duck Antenna - SMA Male Connector
L-com Global Connectivity
$461.99
3300-4200 Mhz| 18 Dbi| Sector Panel Antenna| 45 Deg. Slant Polarized| 2 X N-Type Female Connectors
L-com Global Connectivity
$461.99
3300-4200 Mhz| 18 Dbi| Sector Panel Antenna| 45 Deg. Slant Polarized| 2 X N-Type Female Connectors
L-com Global Connectivity
$99.99
800/900 Mhz 6 Dbi Omnidirectional Antenna
L-com Global Connectivity
$99.99
800/900 Mhz 6 Dbi Omnidirectional Antenna
L-com Global Connectivity
$119.90
Viavi TRI-LKG-ANT-DUAL-DUCK Rubber Duck Antenna For Seeker HL
Test Equipment Depot
$119.90
Viavi TRI-LKG-ANT-DUAL-DUCK Rubber Duck Antenna For Seeker HL
Test Equipment Depot
$12.59
136-174 Mhz Rubber Duck Antenna| 1.8 Dbi Gain| TNC Male Connector| Vertical Polarization
L-com Global Connectivity
$12.59
136-174 Mhz Rubber Duck Antenna| 1.8 Dbi Gain| TNC Male Connector| Vertical Polarization
L-com Global Connectivity
$381.99
L-Com HG3342DP-24D Rf Antenna, 3.3 To 4.2Ghz, 24Dbi | RF Antennas
Newark
$381.99
L-Com HG3342DP-24D Rf Antenna, 3.3 To 4.2Ghz, 24Dbi | RF Antennas
Newark
$29.11
$32.02
Liftmaster External Antenna
North Shore Commercial Door
$29.11
$32.02
Liftmaster External Antenna
North Shore Commercial Door
$689.00
Tekbox TBMA4 - 1 Ghz 8 Ghz, Double Ridged Horn Antenna
TEquipment
$689.00
Tekbox TBMA4 - 1 Ghz 8 Ghz, Double Ridged Horn Antenna
TEquipment
$121.99
900 Mhz 9 Dbi Heavy Duty Flat Panel Antenna
L-com Global Connectivity
$121.99
900 Mhz 9 Dbi Heavy Duty Flat Panel Antenna
L-com Global Connectivity
$1,985.00
Com-Power PAM-103 - Compare Preamplifier, 1 To 1000 Mhz, 33 Db Gain
TEquipment
$1,985.00
Com-Power PAM-103 - Compare Preamplifier, 1 To 1000 Mhz, 33 Db Gain
TEquipment
$11,040.00
Com-Power AHA-118 - Active Double Ridge Horn Antenna
TEquipment
$11,040.00
Com-Power AHA-118 - Active Double Ridge Horn Antenna
TEquipment
$229.99
4.9-5.8Ghz Dual Polarized 17Dbi Panel Antenna - N-Female Connectors
L-com Global Connectivity
$229.99
4.9-5.8Ghz Dual Polarized 17Dbi Panel Antenna - N-Female Connectors
L-com Global Connectivity
$200.00
PCTEL BMYD890K - RF & Antenna Supplies
Radwell.com
$200.00
PCTEL BMYD890K - RF & Antenna Supplies
Radwell.com
$191.00
TELULAR EXDL-0 - RF & Antenna Supplies
Radwell.com
$191.00
TELULAR EXDL-0 - RF & Antenna Supplies
Radwell.com
$98.99
800/900 Mhz 3 Dbi Omnidirectional Antenna
L-com Global Connectivity
$98.99
800/900 Mhz 3 Dbi Omnidirectional Antenna
L-com Global Connectivity
$482.00
L COM HG913P-120 - RF & Antenna Supplies
Radwell.com
$482.00
L COM HG913P-120 - RF & Antenna Supplies
Radwell.com
$48.00
UHF & VHF Wide Band 1/4 Wave Antenna With Spring (132 - 525 Mhz)
Rad Parts
$48.00
UHF & VHF Wide Band 1/4 Wave Antenna With Spring (132 - 525 Mhz)
Rad Parts
$76.99
2.4/4.9-5.8 Ghz 3 Dbi Black Mobile Omnidirectional Antenna - NMO Connector
L-com Global Connectivity
$76.99
2.4/4.9-5.8 Ghz 3 Dbi Black Mobile Omnidirectional Antenna - NMO Connector
L-com Global Connectivity
$39.15
440Mhz-470Mhz Omnidirectional Sealed Antenna 400 Series SMB IP68
L-com Global Connectivity
$39.15
440Mhz-470Mhz Omnidirectional Sealed Antenna 400 Series SMB IP68
L-com Global Connectivity
$157.99
900 Mhz 8Dbi Omni-Directional Antenna
L-com Global Connectivity
$157.99
900 Mhz 8Dbi Omni-Directional Antenna
L-com Global Connectivity
$229.99
400 To 470 Mhz| 3 Dbi Folded Diploe Antenna With N Female| Vertical Polarization| 1 Port| 1.5 VSWR
L-com Global Connectivity
$229.99
400 To 470 Mhz| 3 Dbi Folded Diploe Antenna With N Female| Vertical Polarization| 1 Port| 1.5 VSWR
L-com Global Connectivity
$142.00
EFECTOR R360/CANREMOTE/ANTENNA/DUAL-EC2116 - RF & Antenna Supplies
Radwell.com
$142.00
EFECTOR R360/CANREMOTE/ANTENNA/DUAL-EC2116 - RF & Antenna Supplies
Radwell.com
$331.99
High Density 2.4/4.9-5.8 Ghz 4-Element| Dual Polarized MIMO Panel Antenna - N-Female Connectors
L-com Global Connectivity
$331.99
High Density 2.4/4.9-5.8 Ghz 4-Element| Dual Polarized MIMO Panel Antenna - N-Female Connectors
L-com Global Connectivity
$194.00
BOSCH B40-MB50 - RF & Antenna Supplies
Radwell.com
$194.00
BOSCH B40-MB50 - RF & Antenna Supplies
Radwell.com
$9.19
400-520 Mhz Rubber Duck Antenna| 2.15 Dbi Gain| TNC Male Connector| Vertical Polarization
L-com Global Connectivity
$9.19
400-520 Mhz Rubber Duck Antenna| 2.15 Dbi Gain| TNC Male Connector| Vertical Polarization
L-com Global Connectivity
$3,890.00
Com-Power AH-118 - Double Ridge Horn Antenna 700 Mhz To 18 Ghz
TEquipment
$3,890.00
Com-Power AH-118 - Double Ridge Horn Antenna 700 Mhz To 18 Ghz
TEquipment
展开
隐藏
1024×882
store.raceamerica.com
4590A - High Gain Yagi Antenna
1000×1000
B&H Photo Video
Wilson Electronics Yagi Specialized High Gain A…
1344×1022
DX Engineering
Hy-Gain TH-3MK4 Hy-Gain HF Beam Antennas | DX Engineering
1200×1200
retevissolutions.com
MR004 High gain GMRS Antenna
650×600
prsync.com
Four High Gain 4G Outdoor LTE Antennas to Recommend
700×500
data-alliance.net
Directional Antennas: Longer Range / High Gain by narrowing the beam - D…
800×1067
europa.nasa.gov
Standing Tall: Europa Clipper's High-Gain …
858×1600
ar.inspiredpencil.com
Hy Gain Antennas
1500×1500
aareff.com
5/8 Wave 2KW Vertical High Gain FM Broadcasting Antenna
700×640
uk-1264.blogspot.com
[View 37+] High Gain Lte Antenna
1200×1186
antennas.com
CMV-603E HF Conical Monopole Antenna CMV-603…
2740×2162
ead-ltd.com
New high gain multi constellation GNSS antenna - EAD
2448×3264
aareff.com
5/8 Wave 2KW Vertical High Gai…
689×538
DX Engineering
Hy-Gain LJ-204BA Hy-Gain HF Beam Antennas | DX Engineering
3:00
youtube.com > Antennas-Amplifiers
Full Size 20 meter 3 Element Yagi Antenna: PA14-3-6HD
YouTube · Antennas-Amplifiers · 8570 次播放 · 2021年5月22日
1280×1280
powerfulsignal.com
Wilson Electronics High-Gain LPDA/Yagi Antenn…
475×700
radioworld.co.uk
HF base antennas - Rad…
700×500
antennas-amplifiers.com
LoRa-5.5 High Gain Omni Antenna for Helium Miner 5.5 dBi
购买 high gain antenna at 4:33 mhz
赞助
$461.99
3300-4200 Mhz| 18 Dbi| Sector Panel Antenna| 45 Deg. Slant Polarized| 2 X N-Type Female Connectors
L-com Global Connectivity
$461.99
3300-4200 Mhz| 18 Dbi| Sector Panel Antenna| 45 Deg. Slant Polarized| 2 X N-Type Female Connectors
L-com Global Connectivity
$99.99
800/900 Mhz 6 Dbi Omnidirectional Antenna
L-com Global Connectivity
$99.99
800/900 Mhz 6 Dbi Omnidirectional Antenna
L-com Global Connectivity
$119.90
Viavi TRI-LKG-ANT-DUAL-DUCK Rubber Duck Antenna For Seeker HL
Test Equipment Depot
$119.90
Viavi TRI-LKG-ANT-DUAL-DUCK Rubber Duck Antenna For Seeker HL
Test Equipment Depot
$12.59
136-174 Mhz Rubber Duck Antenna| 1.8 Dbi Gain| TNC Male Connector| Vertical Polarization
L-com Global Connectivity
$12.59
136-174 Mhz Rubber Duck Antenna| 1.8 Dbi Gain| TNC Male Connector| Vertical Polarization
L-com Global Connectivity
$381.99
L-Com HG3342DP-24D Rf Antenna, 3.3 To 4.2Ghz, 24Dbi | RF Antennas
Newark
$381.99
L-Com HG3342DP-24D Rf Antenna, 3.3 To 4.2Ghz, 24Dbi | RF Antennas
Newark
$29.11
$32.02
Liftmaster External Antenna
North Shore Commercial Door
$29.11
$32.02
Liftmaster External Antenna
North Shore Commercial Door
$689.00
Tekbox TBMA4 - 1 Ghz 8 Ghz, Double Ridged Horn Antenna
TEquipment
$689.00
Tekbox TBMA4 - 1 Ghz 8 Ghz, Double Ridged Horn Antenna
TEquipment
$121.99
900 Mhz 9 Dbi Heavy Duty Flat Panel Antenna
L-com Global Connectivity
$121.99
900 Mhz 9 Dbi Heavy Duty Flat Panel Antenna
L-com Global Connectivity
$1,985.00
Com-Power PAM-103 - Compare Preamplifier, 1 To 1000 Mhz, 33 Db Gain
TEquipment
$1,985.00
Com-Power PAM-103 - Compare Preamplifier, 1 To 1000 Mhz, 33 Db Gain
TEquipment
$11,040.00
Com-Power AHA-118 - Active Double Ridge Horn Antenna
TEquipment
$11,040.00
Com-Power AHA-118 - Active Double Ridge Horn Antenna
TEquipment
$229.99
4.9-5.8Ghz Dual Polarized 17Dbi Panel Antenna - N-Female Connectors
L-com Global Connectivity
$229.99
4.9-5.8Ghz Dual Polarized 17Dbi Panel Antenna - N-Female Connectors
L-com Global Connectivity
$200.00
PCTEL BMYD890K - RF & Antenna Supplies
Radwell.com
$200.00
PCTEL BMYD890K - RF & Antenna Supplies
Radwell.com
$191.00
TELULAR EXDL-0 - RF & Antenna Supplies
Radwell.com
$191.00
TELULAR EXDL-0 - RF & Antenna Supplies
Radwell.com
$98.99
800/900 Mhz 3 Dbi Omnidirectional Antenna
L-com Global Connectivity
$98.99
800/900 Mhz 3 Dbi Omnidirectional Antenna
L-com Global Connectivity
$482.00
L COM HG913P-120 - RF & Antenna Supplies
Radwell.com
$482.00
L COM HG913P-120 - RF & Antenna Supplies
Radwell.com
$48.00
UHF & VHF Wide Band 1/4 Wave Antenna With Spring (132 - 525 Mhz)
Rad Parts
$48.00
UHF & VHF Wide Band 1/4 Wave Antenna With Spring (132 - 525 Mhz)
Rad Parts
$76.99
2.4/4.9-5.8 Ghz 3 Dbi Black Mobile Omnidirectional Antenna - NMO Connector
L-com Global Connectivity
$76.99
2.4/4.9-5.8 Ghz 3 Dbi Black Mobile Omnidirectional Antenna - NMO Connector
L-com Global Connectivity
$39.15
440Mhz-470Mhz Omnidirectional Sealed Antenna 400 Series SMB IP68
L-com Global Connectivity
$39.15
440Mhz-470Mhz Omnidirectional Sealed Antenna 400 Series SMB IP68
L-com Global Connectivity
900×900
outbackantennas.com.au
Buy Omni Antenna Outdoor 360° 4G-5G High Gain 18dBi, 698 to …
768×768
cansel.ca
Cansel | Spectra Precision High Gain Antenna 450-470Mhz
1601×1601
walmart.com
Suction Cup Antenna High Gain 5G/4G/3G/2G/NBloT Full Band …
1536×1536
airpluxtec.com
800-1800MHz High Gain Omni-directional Base Station Antenna
800×800
scimagic.com.cn
IP65 Waterproof 868 MHz Antenna High Gain 868mhz Antenna 7dBi
800×800
aliexpress.com
915mhz 868mhz Lora 900mhz Antenna With Magnetic Bas…
1800×2400
shakespeare-ce.com
RTA-SDL (400-450MHz) - Shakesp…
1920×1920
airpluxtec.com
800-1800MHz High Gain Omni-directional Base Station Ante…
2560×1848
shop.rfwel.com
900 MHz Directional Yagi Antenna - High Gain
1000×1000
walkytalkyshop.com
Talinfone 3.5-50MHz Multi-Band HF VHF High Gain Ant…
1000×1000
hi-radio.com
Talinfone 3.5-50MHz Multi-Band HF VHF High Gain Ant…
1000×1000
walkytalkyshop.com
Talinfone 3.5-50MHz Multi-Band HF VHF High Gain Antenna - W…
960×960
szsdantenna.en.made-in-china.com
698-2700MHz High Gain Omni LTE 4G Antenna with Magnetic Base …
1000×1000
fatwiredist.ca
High Gain Grid Antenna, 600 Mhz to 6 GHz | Antennas | LTE & Cell…
1728×2160
scitechdaily.com
Powerful Antenna for NASA’s Roman Space Te…
700×640
onlinegamewallhd.blogspot.com
[Get 33+] 18dbi High Gain Flat Panel 4g Outdoor Antenna
571×965
fity.club
Yagi Calculator
某些结果已被隐藏,因为你可能无法访问这些结果。
显示无法访问的结果
查看更多图片
购买 high gain antenna at 4:33 mhz
赞助
$381.99
3300-4200 Mhz| 2-Foot| 24 Dbi| Parabolic Dish Antenna| Vertical/Horizontal Polarized| 2 X N-Type Female Connectors
L-com Global Connectivity
$381.99
3300-4200 Mhz| 2-Foot| 24 Dbi| Parabolic Dish Antenna| Vertical/Horizontal Polarized| 2 X N-Type Female Connectors
L-com Global Connectivity
$52.99
27 Mhz Omni Antenna 4 Dbi Gain| Spring UHF Male Connector| Stainless Steel
L-com Global Connectivity
$52.99
27 Mhz Omni Antenna 4 Dbi Gain| Spring UHF Male Connector| Stainless Steel
L-com Global Connectivity
$121.99
900 Mhz 8 Dbi Flat Patch Antenna - 4ft SMA Male Connector
L-com Global Connectivity
$121.99
900 Mhz 8 Dbi Flat Patch Antenna - 4ft SMA Male Connector
L-com Global Connectivity
$295.99
3300-4200 Mhz| 1-Foot| 18 Dbi| Parabolic Dish Antenna| Vertical/Horizontal Polarized| 2 X N-Type Female Connectors
L-com Global Connectivity
$295.99
3300-4200 Mhz| 1-Foot| 18 Dbi| Parabolic Dish Antenna| Vertical/Horizontal Polarized| 2 X N-Type Female Connectors
L-com Global Connectivity
$720.00
3300-4200 Mhz| 17 Dbi| Sector Panel Antenna| 45 Deg. Slant Polarized| 4 X N-Type Female Connectors
L-com Global Connectivity
$720.00
3300-4200 Mhz| 17 Dbi| Sector Panel Antenna| 45 Deg. Slant Polarized| 4 X N-Type Female Connectors
L-com Global Connectivity
$17.99
4.5 Dbi Rubber Duck Antenna 2|400-2|500 Mhz RP-TNC Connector
L-com Global Connectivity
$17.99
4.5 Dbi Rubber Duck Antenna 2|400-2|500 Mhz RP-TNC Connector
L-com Global Connectivity
$66.99
900 Mhz 6 Dbi Yagi Antenna N Female Connector
L-com Global Connectivity
$66.99
900 Mhz 6 Dbi Yagi Antenna N Female Connector
L-com Global Connectivity
$970.00
406 Mhz - 512 Mhz 2 Folded Dipole Antenna| 7.6 Dbi Gain| 1/4 Wave Offset Pattern| V-Pol| Type N Female Connector
L-com Global Connectivity
$970.00
406 Mhz - 512 Mhz 2 Folded Dipole Antenna| 7.6 Dbi Gain| 1/4 Wave Offset Pattern| V-Pol| Type N Female Connector
L-com Global Connectivity
$92.99
698-960/1710-2700 Mhz 3/4 Dbi Omni Directional DAS Antenna - N-Female
L-com Global Connectivity
$92.99
698-960/1710-2700 Mhz 3/4 Dbi Omni Directional DAS Antenna - N-Female
L-com Global Connectivity
$201.99
900 Mhz 8 Dbi Omnidirectional Antenna
L-com Global Connectivity
2
$201.99
900 Mhz 8 Dbi Omnidirectional Antenna
L-com Global Connectivity
$39.19
900 Mhz 5Dbi Rubber Duck Antenna - SMA Male Connector
L-com Global Connectivity
$39.19
900 Mhz 5Dbi Rubber Duck Antenna - SMA Male Connector
L-com Global Connectivity
$461.99
3300-4200 Mhz| 18 Dbi| Sector Panel Antenna| 45 Deg. Slant Polarized| 2 X N-Type Female Connectors
L-com Global Connectivity
$461.99
3300-4200 Mhz| 18 Dbi| Sector Panel Antenna| 45 Deg. Slant Polarized| 2 X N-Type Female Connectors
L-com Global Connectivity
$99.99
800/900 Mhz 6 Dbi Omnidirectional Antenna
L-com Global Connectivity
$99.99
800/900 Mhz 6 Dbi Omnidirectional Antenna
L-com Global Connectivity
$119.90
Viavi TRI-LKG-ANT-DUAL-DUCK Rubber Duck Antenna For Seeker HL
Test Equipment Depot
$119.90
Viavi TRI-LKG-ANT-DUAL-DUCK Rubber Duck Antenna For Seeker HL
Test Equipment Depot
$12.59
136-174 Mhz Rubber Duck Antenna| 1.8 Dbi Gain| TNC Male Connector| Vertical Polarization
L-com Global Connectivity
$12.59
136-174 Mhz Rubber Duck Antenna| 1.8 Dbi Gain| TNC Male Connector| Vertical Polarization
L-com Global Connectivity
$381.99
L-Com HG3342DP-24D Rf Antenna, 3.3 To 4.2Ghz, 24Dbi | RF Antennas
Newark
$381.99
L-Com HG3342DP-24D Rf Antenna, 3.3 To 4.2Ghz, 24Dbi | RF Antennas
Newark
$29.11
$32.02
Liftmaster External Antenna
North Shore Commercial Door
$29.11
$32.02
Liftmaster External Antenna
North Shore Commercial Door
$689.00
Tekbox TBMA4 - 1 Ghz 8 Ghz, Double Ridged Horn Antenna
TEquipment
$689.00
Tekbox TBMA4 - 1 Ghz 8 Ghz, Double Ridged Horn Antenna
TEquipment
报告不当内容
请选择下列任一选项。
无关
低俗内容
成人
儿童性侵犯
反馈