Different machines are usually composed of several limited common structures, for example, the main structures of gas engine, compressor and punch etc are crank-slider structures.
不同的机器往往由有限的几种常用机构组成，如内燃机、压缩机和冲床等的主体机构都是曲柄滑块机构。
The main shaft between the air compressor and the gas turbine in a jet aircraft engine is hollow to permit an internal speed reduction shaft with the minimum requirement of space and weight.
在喷气式飞机发动机内位于空气压缩和燃气涡轮之间的主轴是空心的，允许有一个需要最小空间和重量的内部减速轴。
Application: Main shaft of airplane engine or machine tool, high frequency motor, air compressor, oil pump and so on.
应用领域：飞机发动机或车床主轴，高频发动机，空气压缩机，油泵等。
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