The make-up tong is placed on the top tool joint and the break-out tong is placed on the bottom tool joint.

外钳打在上边的接头上，内钳打在下边的接头上。

youdao

The make-up tong is placed on the top tool joint and the break-out tong is placed on the bottom tool joint.

外钳打在上边的接头上，内钳打在下边的接头上。

youdao