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
开关采插接式结构,以减少对煤矿生产的影响。
]插接板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,许多矿开关采插接式结构,以减少对煤矿生产的影响。
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