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Terms for subject Explosives and Explosive Ordnance Disposal containing 护层 | all forms | in specified order only
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护层为了降低邻近煤层冲击矿压〈煤层气突出〉危险程度而先开采的煤层protective seam
爆破防护层爆破物上面用来防止飞石的覆盖物,常由废轮胎、木材、绳索或电缆制作blasting mat
被保护层由于保护层的开采,冲击矿压、煤层气突出危险程度降低或消除的煤层protected seam
被保护层由于保护层的开采,冲击矿压、煤层气突出危险程度降低或消除的煤层stress-relieved seam