... 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 ...
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(1)齿条(2)调位装置(3)对光旋钮，调焦旋钮
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... 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 ...
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