The macroscopic effects of protective door under compound action of shock wave and fragment are reviewed by explosion in Prototype tunnel.
利用原型坑道内爆炸试验，考察了破片和空气冲击波的复合作用对防护门的宏观破坏效应。
With reliable explosion-proof performances, complete unit adopts compound. type complete-unit explosion-proof structure.
防爆性能可靠，整机采用复合型防爆型式，整机防爆。
Compound structure of safety - increased type, with functions of water - proofing, dust-proofing inside is arranged button, indicator, Ammeter of explosion-proof types.
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.
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。
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