The frame is equipped with an oil dipstick, the oil level should retain in the middle position.Generally, lubricants are the mechanical oil 20#, 30# or 40#.是什么意思_The frame is equipped with an oil dipstick, the oil level should retain in the middle position.Generally, lubricants are the mechanical oil 20#, 30# or 40#.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句