The operation performance of driller, used for basement construction, is dependent on the quality of power unit in a considerable degree.
基础工程钻机性能的好坏，很大程度取决于动力头的质量。
The operation performance of driller, used for basement construction, is dependent on the quality of power unit in a considerable degree.
基础工程钻机性能的好坏，很大程度取决于动力头的质量。
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