• Now blacksmiths use pneumatic hammers which produce less noise but are also less productive than the first ones.

    如今锻造师们使用风动,因为的噪音更小但是生产效率则不及以前。

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  • Road workers use pneumatic hammers to break up pavement.

    筑路工人气动路面。

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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.

    穿孔过程中自身回转开挖气动包括冲击管锤。

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  • But the matching impact bits often dropped off from the pneumatic hammers and led the well accident caused by complex factors.

    但是空气锤、特别是配套冲击钻头导致井下事故时有发生,影响因素极为复杂

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  • Then the mutual affection of multi-pneumatic-hammers was studied using the theory of elasticity wave and random modulation.

    然后利用弹性理论信号随机调制理论,分析了多路随机振动互相作用。

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  • Then the mutual affection of multi-pneumatic-hammers was studied using the theory of elasticity wave and random modulation.

    然后利用弹性理论信号随机调制理论,分析了多路随机振动互相作用。

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