整套钻具包括：钻具总成、打捞器、钻杆、绞车、提引器、夹持器及自由钳等部件。
All the tools include principal of the drill tools, overshot assembly, drill rods, holding dog, circle wrench and etc.
附设液压夹持器，并配以手动御扣装置，使拆御钻杆更方便。
Equipped with hydraulic holder and hand powered unscrewer, to untighen the drill rod easily.
附设液压夹持器，并配以手动御扣装置，使拆御钻杆更方便。
Equipped with hydraulic holder and hand powered unscrewer, to untighen the drill rod easily.
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