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1. Pneumatic actuators in double-acting and spring - return configurations.

2. They are available in either double-acting or spring - return configurations.

3. In a double-acting engine there is only one piston percylinder.

4. The double-acting variable-vane pump is a new type of variable pump.

5. The revolver divides the single acting and the double-acting two kinds.

6. Position Indicating Switches are available for use on double-acting cylinder actuators.

7. Conclusion Activin A may plays double-acting role in regulation of the activity of macrophages(http://Sentencedict.com), and this action relates with the state of activation of macrophages.

8. AW series of large diameter valves using pneumatic actuator fork-type transmission, reasonable structure, output torque, a double-acting and single acting.

9. Four - Way Diaphragm Pilot Valves are for use on all double-acting pneumatic cylinder actuators.

10. Four - Way Manual Control Valves are for all pneumatic or hydraulic double-acting cylinder actuators.

11. If the piston round trip, the suction and discharge the two liquids, known as double-acting pump.

12. In both cases a large open space is left at the center for locating the double-acting hydraulic ram which is used to push and pull, respectively, the chain conveyor and the chock in a whole unit.

13. The active roll stabilizer mechanism consists of a U-shaped stabilizer bar, a single-rod double-acting hydraulic cylinder, a rod and li.