短語(yǔ)詞組短語(yǔ)normally y closed contact 常閉接點(diǎn)normally open closed contact 常開(kāi)觸點(diǎn)normally closed auxiliary contact 常閉輔助觸點(diǎn);常閉輔助接點(diǎn)contact normally closed 常閉觸點(diǎn) 返回 normally closed contact