Impact tapping, as a novel technology of internal thread processing ,has some important effect and a good applied foreground in the machining of small diameter thread ,especially for thin board .是什么意思_Impact tapping, as a novel technology of internal thread processing ,has some important effect and a good applied foreground in the machining of small diameter thread ,especially for thin board .在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句