Don't switch on during drilling operation.
钻井作业期间不能合闸。
If the initial workpiece is solid, a drilling operation must be performed first.
如果初始工件是实心的，则必须首先进行钻孔作业。
Also in development are new drilling muds that cool the drill bit during operation.
新的钻探泥浆(用于在操作时冷却钻头)也在开发中。
Drilling there would be strictly a wildcat operation.
在那里钻井绝对是一次盲目的行动。
The drilling equipment and operation platform are described.
介绍了施工设备及施工平台。
The drilling equipment and operation platform are described.
介绍了施工设备及施工平台。
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