The Martin/General Dynamics RB-57F Canberra is a specialized strategic reconnaissance aircraft developed in the 1960s for the United States Air Force by General Dynamics from the Martin B-57 Canberra tactical bomber, which itself was a license-built version of the English Electric Canberra.

The Martin B-57 Canberra is an American-built, twin-engined tactical bomber and reconnaissance aircraft that entered service with the United States Air Force (USAF) in 1953. The B-57 is a license-built version of the British English Electric Canberra, manufactured by the Glenn L. …

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Ytterbium is a chemical element; it has symbol Yb and atomic number 70. It is a metal, the fourteenth and penultimate element in the lanthanide series, which is the basis of the relative stability of its +2 oxidation state. Like the other lanthanides, its most common oxidation state is +3, as in its oxide, halides, and other compounds.

2024年7月3日 · The WB-57 is a mid-wing, long-range aircraft capable of operation for extended periods of time from sea level to altitudes in excess of 60,000 feet. Two crew members are positioned at separate tandem stations in the forward section of the fuselage.

B-57轰炸机（英文：B-57 Bomber，绰号：Canberra，译文：堪培拉）是20世纪50年代美国研制装备的全天候双座喷气式轰炸机。B-57轰炸机是美国马丁公司在英国的“堪培拉”轰炸机基础上发展的，为了满足美空军要求，结构有所改进。

The Martin/English Electric B-57 Canberra registry follows the history of all Canberras that survived military service.

2019年11月3日 · 内容提示： ICS 77. 140. 70H 44Y日中华 人 民共和 国黑色冶金行 业标 准YB/T 5227-2005代替、'B/T 5227-2000汽车车轮轮辆用热轧型钢Hot-rolled section steel for automobile wheel felloe2005- 07-26发布 2005-12- 01实施中华人 民共和 国国家发 展和改革 ... 上传日期：2019-11-03 05:57:00 ...

2015年8月10日 · yb_t 5357-2009 钢丝镀层 锌或锌-5%铝合金 星级： 10 页 【黑色冶金行业标准】yb t 4222-2010 预绞式金具用镀层钢丝 标准 星级： 9 页 【黑色冶金行业标准】yb t 4221-2010 机编钢丝网用镀层钢丝 标准 ...

2025年2月9日 · gbu-57/b是一种重达3万磅的精确制导钻地弹，专门用于打击深埋地下的加固目标，目前只有b-2轰炸机获准在实战中使用该武器。 根据美国国防部测试与评估办公室（DOT&E）的最新年度报告，空军在2024财年进行了两次全面测试，验证了B-2整合问题的修复情况，并在第 ...