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靜音膨脹劑操作指導(dǎo)
形狀規(guī)則物體的破碎
Cutting objects of regular shape
地表地面的挖掘
Digging the ground
橋墩橋臺(tái)的破碎
Breaking bridge piers and abutments
原石開(kāi)采
Mining rough stone
壕溝渠道的開(kāi)挖
Excavating entrenchment
隧道挖掘或鉆井
Digging tunnels or boreholes
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