筒式钻头

hose bit的用法和样例：

例句

A good way to help you to improve drilling technique is to use a jet bit.能帮助你们改进钻井技术的一种好方法是使用喷射式钻头。

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发表于:2018-11-30 / 阅读(216) / 评论(0)

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发表于:2018-12-03 / 阅读(136) / 评论(0)

在家—At Home

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Bill Is Very Rude

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A bit too bright for its own good

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Poor snake

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学英语单词

agent's fee

Ambition must be made to counteract ambition.

attributable(to)

barium plasma

be frozen to the bone

beneficial interest in property

bona fide health care group

bone mineral density

Brassica juncea Czern. et Coss.

callough

cancer of larynx