| 摘要 |
FIELD: seismology. ^ SUBSTANCE: device has body with exhaust ports, moveable rod with pistons, two working and two control chambers, pneumatic main and pneumatic valve. Working chambers are placed in opposite ends of body and placed symmetrically relatively to exhaust hollow, provided by wall fixed in body. Between first working and first control chambers an additional control chamber is placed to connect them by ring-shaped spaces. Volume of additional chamber is greater than volume of first working chamber. Wall is made in form of ring. ^ EFFECT: higher reliability, higher efficiency, small dimensions, synchronous operation. ^ 2 cl, 2 dwg |
