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
,
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。
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,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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