Stones drilling bit: Use for drilling stones, concrete, firebrick etc. Various type and specification.

石材钻头：适用于石材、混凝土、耐火材料的钻孔。各种型号及规格。

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A set of calculating formulae for vertical milling teeth of drilling bit cones is derived herein from cutting rows with Angle cutters.

本文从尖角铣刀割圆出发，拟出了一套钻头牙轮直铣齿的计算公式。

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The single tooth cutting course of a PDC drilling bit is studied. The research is of great significance for improving PDC drilling bit design.

为了改进PD C钻头设计，在全尺寸试验的基础上，对PD C钻头单齿切削过程进行了试验研究。

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Real estate is a bit like the oil drilling business.

FORBES: What The Heck Is A REIT?

If they do strike oil, however, they might invest a bit more and put the drilling gear in place.

ECONOMIST: Economics focus

Drilling down in the comScore data a bit deeper we find that Facebook and Instagram took the top two mobile app spots by time spent or engagement.

FORBES: Move up http://i.forbesimg.com t Move down