| 摘要 |
A device for displacing tubular elements relative to one another has tw o clamping members each movable between an open position in which each of the clamping members is open and can be arranged on a tubular element and a closed positi on in which each of the clamping members is closed, a fluid-operated unit located betwee n the clamping members and operative for moving the clamping members axially relative to on e another, and a power source operative for supplying the fluid operated unit with power fluid so that it can activate the fluid-operated unit and to move the clamping members relative t o one another. |
