This article has made statistic and analyses on many types of flameproof button and switches used in coalmine, such as travel switch, limit switch, pull switch, and so on.
2
XYZ轴方向均设置了行程限位开关，避免了运转过程中超程的烦恼。
The XYZ axis is arranged trel limit switch, to oid the operation process of the trouble.
3
阀门的启闭位置由行程开关控制，且阀板上设有限位挡块以保证阀板的启闭位置。
There is limit block on the valve disc to ensure the open-close position , which is controlled by the stroke switch.
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