Grab of long brace double-clamshell parameters sys. 長撐桿雙顎抓斗參數系列。
The fatigue fracture reason of the weld seam at the back supporting rod of the main reductor of an aircraft has been analyzed by fractography and metallographic test. 對某飛機主減速器后撐桿焊縫疲勞斷裂原因作了分析。
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