求助一句关于API6D规范中传动链许用应力的英文翻译? In addition the average primary shear stress across a section loaded under design conditions in pure shear , e.g. keys, shear rings , screw threads, etc., shall be limited to 0.6 Sm . 就是上面这句话,我不知道怎么翻译。文中用红色和绿色标出来的部分属于翻译难点,我表示不知道是啥,还有句子最后的那个单位我看不懂。麻烦盖德们帮忙看下,谢谢! 查看更多7个回答 . 2人已关注