由于活塞结构和材料的特殊性，对于它的检测只能采用非接触测量的方法，而目前尚没有成熟的技术。
Because of particularity of structure and material, the piston must be measured by the non - contact method. but, at present there isn ' t mature technique.
采用系统的方法研究了活塞-连杆-曲轴三者在相互接触条件时，在不同转角下的固有振动特性。
Have studied the natural vibration characteristic of the piston - connecting rod - crankshaft while keeping in touch with the condition each other adopting systematic methods.
活塞的主要部分叫活塞裙部。其与气缸壁接触形成了支承面。
The main section of a piston is known as the skirts. It forms a bearing area in contact with the cylinder wall.
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