Therefore this system is a effective means for developing a hydraulic rock drill.

因此该系统是研制液压凿岩机的重要辅助手段。

youdao

This paper designed a new type of muffler for pneumatic rock drill with the theory of impedance.

利用阻抗消声原理为气动凿岩机设计了一种新型的消声罩。

youdao

Rock drill-ability is the basic parameter to optimize bits, make drilling plan and reduce drilling cost.

岩石可钻性是优选钻头，制定生产定额以及降低钻井成本的基础。

youdao

The muscular man is working hard to control a powerful drill that is cutting through the rock that surrounds him.

VOA: special.2009.03.23

Epstein would have felt buoyed up by the excitement that "Rock Drill" generated among his creative allies.

WSJ: Masterpiece: Jacob Epstein's Prophesy

Only in March 1915 was "Rock Drill" shown in a gallery, at the first exhibition of the newly formed London Group.

WSJ: Masterpiece: Jacob Epstein's Prophesy

What meaning did Epstein intend "Rock Drill" to transmit?

WSJ: Masterpiece: Jacob Epstein's Prophesy