Composite structure tappet compos ed of s teel body and ceramic disk has a better wear resistant and wear properties ,and servi ce ability than the using alloy tappet.是什么意思_Composite structure tappet compos ed of s teel body and ceramic disk has a better wear resistant and wear properties ,and servi ce ability than the using alloy tappet.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句