主令控制器由外壳和防爆元件等组合而成。
Master controller is constructed of shell and explosion-proof components.
内置开关采用防爆元件，当产品打开时能自动切断电源。
The inside places the switch adoption flameproof a piece, be the product open can cut off the power supply automatically.
整体为复合型结构，外壳采用增安型结构，具有较强的防水、防尘能力，内装按钮、指示灯、电流表均为防爆元件。
Compound structure of safety - increased type, with functions of water - proofing, dust-proofing inside is arranged button, indicator, Ammeter of explosion-proof types.
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