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。
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。
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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