For maintenance convenience, many electric switches for mine are adopted pinboard construction in order to reduce effect of coal mine production.

为了维修方便，许多矿用电气开关采用插接式结构，以减少对煤矿生产的影响。

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For maintenance convenience, many electric switches for mine are adopted pinboard construction in order to reduce effect of coal mine production.

为了维修方便，许多矿用电气开关采用插接式结构，以减少对煤矿生产的影响。

youdao