Double action
From Wikipedia, the free encyclopedia
Double action may refer to:
- Double-action, a system in firearms where the trigger both cocks and releases the hammer—see trigger (firearms).
- Simple expansion, a system in steam engines and their accessories where a piston has the ability to both push and pull a connecting rod by applying steam pressure alternately to opposite sides of the piston
- Double-acting cylinder, a system in steam and internal combustion engines
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