The utility model relates to a hollow medical electrical drill.

本实用新型涉及一种医用空心手术电钻。

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The article introduces the electrical control of Z3040 radial drill with PLC and explains the hardware and software design of the system.

文章介绍了用PLC对Z 3040摇臂钻床实行电气控制的方法，并对该系统的硬件组成和软件设计作了阐述。

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The mechanical and electrical improvement to Z5030A upright drill press is introduced in brief and the way how to realize automatic orientation by PLC is also illustrated in details.

简单介绍了对原立式钻床Z5030A进行的机械改进和电气改进，详细阐述了利用P LC给工件自动定位的方法。

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In ranging, they withdraw the drill pipe and put down an electrical cable and actually try and sense the magnetic field around the wellbore.

WHITEHOUSE: Press Briefing