| 摘要 |
The two cylinders (2,3) each have a pneumatic piston drive. A measurement and control arrangement of compensating pump (30) and relief valve (31) maintains the synchronism of the pistons. Pump is connected and valve are respectively connected to chamber (8b, 9a) containing hydraulic fluid of cylinders so as to drain fluid (10) from one chamber (9a) or to supply fluid to the other chamber (8b) when pistons are not synchronized. |
