main cock的用法和样例：
例句
- 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。
main cock的相关资料：
临近单词
maintop
main
main wheel differential brake
main transformer differential
Main stem and tiller dynamics
main forestry production area
Main Functional Zone Planning
main steam temperature system
main network switching center
main oil distributing passage
Main afforesting tree species
Main Features of Simple Types
