contact surface of valve seat中文,contact surface of valve seat的意思,contact surface of valve seat翻译及用法 2026-05-05 22:58 浏览次数 20 contact surface of valve seat英[ˈkɔntækt ˈsə:fis ɔv vælv si:t]美[ˈkɑnˌtækt ˈsɚfəs ʌv vælv sit]阀座接触面