| 摘要 |
The system has a double action cylinder connected to pressurized fluid source forming units (14) through control units (15) to inject pressurized fluid in a cylinder body at rear of pistons to deploy the pistons and from outside the body through orifices provided at front ends of body and the successive pistons exception of internal piston, to cause the pistons to retract into the body. Two different pressurized fluid sources are a pressurized gas source (16) to ensure the deployment of the pistons and a pressurized liquid source (17) to ensure the retraction of the pistons. |
