| 摘要 |
A clamp ram device (4) for a power tong (1), the clamp ram (4) comprising an in the power tong (1) displaceable first ram housing (14), and a piston rod (26) connected to an in the first ram housing (14) positioned first piston (24) ex-tending out from the first ram housing (14) and to a retainer in the power tong (1), and the retainer comprising a second ram housing (32), as an in the second ram hosing positioned second piston (28) is connected to the piston rod (26). |
