The pretightening force of FRP construction bolt joint has been researched in the theory of bolt washer stress.
应用螺栓-垫圈应力理论对FRP结构搭接点预紧力进行了研究。
The real problem is the hundreds of thousands of other parts, some as apparently insignificant as a bolt or a washer, that are simply not manufactured any more.
真正的问题是成千上万的其他零部件，一些显然是无足轻重的零件像一个螺丝或者是一个垫圈，而这些东西已不再生产。
Make sure the bolt and washer are installed for the right aft mount on the APU shroud.
确证在APU保护罩的右后吊点上安装了螺栓和垫圈。
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