• The trenchless pneumatic hammers which don t rotate themselves during drilling include impact moles, pipe ramming hammers and pipe bursting hammers.

    穿孔过程中自身回转开挖气动包括冲击管锤。

    youdao

  • The trenchless pneumatic hammers which don t rotate themselves during drilling include impact moles, pipe ramming hammers and pipe bursting hammers.

    穿孔过程中自身回转开挖气动包括冲击管锤。

    youdao

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