In this section, you see when to use each mechanism.
在这个部分中，您将看到应该在何时使用其中每种机制。
Developing optimum cutting mechanism is a key technology for the design of special-section shield.
开发合理的切削机构是异形断面盾构的关键技术之一。
Box section telescopic boom; Telescopic mechanism; Pinless boom; Single cylinder pin type;
箱型伸缩臂； 伸缩机构； 无销式；单缸插销式；
Lei-ring structure of the cross-section, although different, but basically the same as sealing mechanism.
蕾形密封圈的截面结构虽不同，但密封机理基本一致。
Lei-ring structure of the cross-section, although different, but basically the same as sealing mechanism.
蕾形密封圈的截面结构虽不同，但密封机理基本一致。
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