action mechanism

Từ điển WordNet v3.1 - WordNet Dictionary

noun

the operating part that transmits power to a mechanism
- the piano had a very stiff action
• Syn:
action
• Hypernyms:
mechanism
• Hyponyms:
gunlock, firing mechanism, movement, piano action, pump action, slide action
• Part Holonyms:
gun, keyboard
• Part Meronyms:
key