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1. Oxford American Dictionary

   snap-action

   • IPA[ˈsnapˌakSH(ə)n]

   美式

   • adj.
     denoting a switch or relay that makes and breaks contact rapidly, whatever the speed of the activating mechanism.；denoting a gun whose hinged barrel is secured by a spring catch.
   • n.
     the operation of a snap-action switch, relay, or gun.
2. • 釋義

   adj.

   形容詞

   • 1. denoting a switch or relay that makes and breaks contact rapidly, whatever the speed of the activating mechanism.
   • 2. denoting a gun whose hinged barrel is secured by a spring catch.

   n.

   名詞

   • 1. the operation of a snap-action switch, relay, or gun.