The original two stage reducer was the worm gear by Hindley U.S.Now the secondary plane envelope ring surface worm gear pair is used in substitute of the original one after the revamp.是什么意思_The original two stage reducer was the worm gear by Hindley U.S.Now the secondary plane envelope ring surface worm gear pair is used in substitute of the original one after the revamp.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句