设计了试验件和相应的夹具，开展了复合材料层合板螺栓连接结构的部件疲劳实验。
The specimen and corresponding fixture have been designed, and the fatigue experiment of composite component with bolted joint has been carried out.
轮子旋转时需要承受巨大的和不断变化的压力，所以要使结构更坚固，钢的部分要用螺栓连接，而不是焊接在一起。
The wheel would need to withstand immense and constantly changing stresses as it rotated, so to make the structure more robust, the steel sections were bolted rather than welded together.
锥形螺栓，外形是锥形的螺栓，用以将发动机连接到飞机结构上。
Cone bolt, a bolt in the shape of a cone for engine attachment to the airplane structure.
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