main cock

 
  • 总开关

main cock的用法和样例:

例句

  1. The rheostat is operated by rotating the control knob, separating it from the push-pull action of the main lighting switch.
    可变电阻器由旋转的控制手柄操纵,与灯光总开关的推一拉的操纵是分开的。
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