本系列钻杆钳适用于石油、矿场钻井作业。使用本钳能起到安全、省力，提高钻井施工效率。本钳具有以下特点：
¨
背钳夹紧及换档采用压缩空气（ZQ127/25Y除外）；
¨
旋扣钳和扭矩钳一体结构（ZQ127/25Y除外）；
¨
可不停车换档；
¨
正反方向都可产生**大扭矩和转速。
注：ZQ203/75X和ZQ203/145X采用行星爪夹紧机构，在适应范围内不需要更换任何零件。
The Drill Pipe Tong is applicable
in the petroleum and mine drilling, it is safety and labor saving,
and improving the working efficiency. The tongs have the following
features:
¨
Using pneumatic power to shift and drive backup
tong.
¨
It is a integral mechanism made by spin tong and
torque tong.
¨
Changing gear allowed during
operation.
¨
New or old drilling pipe joint could be clamped
reliably
¨
Both directions could run the maximum torque and
rotation speed.
