圆柱钻铤 [油气] cylindrical drill collar
圆柱立式钻床 vertical round column drilling machine ; column drilling machine ; cylindrical vertical drilling machine
圆〔方〕柱立式钻床 column drilling machine ; column drilling machellone
浮圆柱型钻油船 spar type drilling ring
圆［方］柱立式钻床 column drilling machine
圆柱柄冲击钻 cylindrical shank percussion drill
叙述了180涡轮钻具用减速器的传动比，齿轮传动，端面机械密封和偏心短圆柱轴承的设计计算过程和有关处理办法。
The design calculation process and related process methods for transmission ratio, gear transmission, end mechanic sealing and eccentric short roller bearing used for 180 turbine drill are described.
钻头单元由一个强有力的包含单一钻锭的结构组成，钻定运行在完美的青铜圆柱（袖套）面上。
The drilling unit is made of a very strong structure containing the single drilling spindles which run in perfectly ground bronze cylinders (sleeves).
本文建立了基于渐开圆柱面的SPLIT钻数学模型，并进行了实际刃磨。
This paper established the mathematical model of SPLIT drill basing on the involute cylindrical surface, and conducted real edge grinding.
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