... 气动捣杆，气动舂penumatic rammer 气动捣砂pneumatic ramming 气动吊车air hoist ...
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pneumatic ramming pipe method 气动夯管法
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The trenchless pneumatic hammers which don t rotate themselves during drilling include impact moles, pipe ramming hammers and pipe bursting hammers.
穿孔过程中自身不回转的非开挖气动锤包括冲击矛、夯管锤和爆管锤。
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