low voltage installation 低压电力装置 low voltage supply network 低压供电网络 low voltage switchgear and control gear assembly 低压开关及控制组件 ..
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阐述了煤矿井下低压供电网络漏电电流的产生和危害。
This essay expatiates on the harm of low creepage current in coal mines.
31是一个简单的螺丝端子适用于接口应用线圈低压单稳态继电器(24 V)和负荷在供电网络的电压(230 V)。
The 13.31 is a simple monostable relay with screw terminals suitable for interfacing applications where the coil is low-voltage (e. g. 24 v) and load is at the supply network voltage (230 v).
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