| 释义 |
drill bits短语⁹⁶⁶⁷⁷⁺⁶
基本英英例句
取孔钻原型drillbit的复数
名词 drill bit:
a bit used in drilling for oil Bit gauges, rings of defined circumference, are slipped around drill bits to detect and measure wear, which reduces the circumference of the bit during drilling.
钻头规是种周长一定的环型物，它卡紧在钻头的周围，去检测和测量钻头是否磨损，即在钻井过程中是否减少了周长。 www.infopetro.com.cn
For coring crowns, electric coal drill bits, coal cutting picks, cone drill bits and scraping knife bits, used in geological prospecting, coal mining and oil well boring.
适用于地质勘探的取心钻头，煤炭采掘的电煤钻头、截煤机齿，石油钻井的牙轮钻头和刮刀钻头。 tradehn |