Vibratory pile drivers can be extremely economical and therefore the contractors' preferred method of pile driving.

因振动桩锤非常经济，一直受到施工者青睐。

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However, pile drivers are too bulky since the bearing condition of the mechanical model of pile drivers is different from that of crane jibs.

但是由于桩架力学模型的支承条件与起重机臂架不同，故桩架显得笨重。

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Two lorry drivers killed in an eight-vehicle pile-up on the M6 in south Cumbria have been named.

BBC: Lorry drivers killed in M6 eight-vehicle pile-up named