Turn the coupling with the hand, should feel can easily turn the gear pump, no abnormal phenomenon such as clamping, then can be piping.

用手转动联轴器时，应感觉到齿轮泵能够轻松地转动，没有卡紧等异常现象出现，然后才可以配管。

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The utility model belongs to a scope of electric pipe connection pieces, in particular to a muff-coupling clamping closed galvanized steel conduit joint device.

本实用新型公开了属于电气管线连接件范围，特别涉及一种套接紧定式封闭型镀锌钢导管接头装置。

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