A new type of electroplated diamond bits is developed and produced by adopting.

本文采用复合电镀新工艺来研制和生产金刚石钻头。

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Comprehensive evaluation of diamond bits and supporting plan of deep foundation pit with fuzzy optimal theory.

优化理论模型在金刚石钻头和深基坑支护方案综合评价中的应用。

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It is proposed that economical performance of diamond bits be quantitatively appraised by use of bit drilling cost.

并提出用钻头钻进成本定量地评价金刚石钻头的经济效果。

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For nine months the ship Transocean Discoverer Spirit used 360-degree rotating propellers to hold itself steady in the 3, 500-foot-deep water as diamond-tipped bits cut the deepest oil well ever--6.5 miles down.

FORBES: Magazine Article

It had a tidy business in early 1997 selling coin-size diamond-embedded inserts that fit into larger drill bits used to dig oil and gas wells.

FORBES: Money & Investing