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rackwork

1、齿条机构

...rackscope ==> 支架式示波器rackwork ==> 齿条机构,齿条加工,调位装置RACS, redundant attitude control system ==> 予备姿势制御系 ...

2、调焦旋钮

...调焦旋钮 focus knob; focusing knob; rackwork精调焦旋钮 fine-focusing knob细调焦旋钮 fine-focusing screw ...

3、齿条调位装置对光旋钮

(1)齿条(2)调位装置(3)对光旋钮，调焦旋钮

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