The AC1234-4 is a fully automatic ACS machine that meets or exceeds SAE J2927 and J2843 standards for 1234yf recovery. The machine includes an integrated refrigerant identifier that samples the refrigerant in the vehicle’s A/C system prior to recovery.

1，2，3，4 四个数字有24种 排列组合。 4的阶乘=24种。 组合C (n,m)=P (n,m)/P (m,m) =n!/m!（n-m）!； 允许有重复数字且不限定位数的话，有无穷多种。 不允许有重复数字且限定4位数的话，有4！ =24种。 不允许有重复数字且不限定位数的话，1位数有4种，2位数有A（4，2）=12种，3位数有A（4，3）=24种，4位数有24种，共4+12+24+24=64种。 1，2，3，4 四个数字有多少种排列组合，是怎样的1，2，3，4 四个数字有24种排列组合。

The AC1234-4 is a fully automatic ACS machine that meets or exceeds SAE J2927 and J2843 standards for 1234yf recovery. The machine includes an integrated refrigerant identifier that samples the refrigerant in the vehicle’s A/C system prior to recovery.

Robinair Premier R-1234yf Recovery, Recycling, and Recharging Unit (AC1234-4) is a highly advanced service machine that meets and exceeds the standards for handling R-1234yf refrigerants. Its comprehensive capabilities ensure efficient recovery, recycling, and recharging of automotive A/C systems.

ROBINAIR.COM 800.533.6127. Recover, Recycle, Recharge Machine for R1234yf A/C System. Instruction Manual (Original Instructions) Model AC1234-4SL (en-US)

Robinair ROB-1234YF-4 Recover, Recycle, and Recharge Machine • Fully automatic operation — program for service, walk away and return when complete • 98.5% recovery efficiency • Charge accuracy within +/- 1/2 oz • Automatic internal tank refill. No stopping to fill the internal tank during service, or before service

2021年3月19日 · The Robinair AC1234-4SL is a fully automatic R-1234yf ACS machine, with all the great features of the AC1234-4, but with an integrated scale lock, designed for mobile service. The mechanical scale lock eliminates the need to recalibrate your refrigerant scale after transporting the machine long distances..

The AC1234-4 is a fully automatic ACS machine that meets or exceeds SAE J2927 and J2843 standards for 1234yf recovery. The machine includes an integrated refrigerant identifier that samples the refrigerant in the vehicle’s A/C system prior to recovery.

1234这四个数字，最多能有多少种排列，以组排列出来。 列如:“1243”.“131234这4个不同数字组成的排列，共有4*3*2=24种。 具体如下：1>千分位为1：1234、1243、1324、1342、1423、1432；2>千分位为2：2134、214

Replacement parts for AC1234-4. Filter. Compare. 16916. R-1234yf Oxygen Sensor . Learn more. 16913. Refrigerant identifier replacement filter. Learn more. 34724. Recycling Filter-Driers. Learn more. 13119. Premium High Vacuum Pump Oil, Pint …