In this article, the working principle and design calculations of a new type of DTH impacter are described.

介绍一种新型潜孔冲击器的工作原理和设计计算。

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In this article, the working principle and design calculations of a new type of DTH impacter are described.

介绍一种新型潜孔冲击器的工作原理和设计计算。

youdao