A vernier drive is an essential item here as the tuning is very sharp.I made the dial from white styrene.Use your imagination to make a dial of your own.是什么意思_A vernier drive is an essential item here as the tuning is very sharp.I made the dial from white styrene.Use your imagination to make a dial of your own.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句