Oil of reducer should be replaced every half year.The oil storage of reducer must be kept on prescribe oil level during operation and should not be too much.是什么意思_Oil of reducer should be replaced every half year.The oil storage of reducer must be kept on prescribe oil level during operation and should not be too much.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句