[鐵路] 回動閥體 reverse cylinder valve body cap: 回動汽缸閥體蓋reverse valve: 回到閥; 回動閥; 可逆閥body of valve: 閥體valve body: 閥殼; 閥身; 閥體; 活門殼體large reverse body bush: 回動體大襯套下載手機詞典可隨時隨地查詞查翻譯