During this time, the screw moves back while turning to carry out a new proportioning by bringing material melted to the front of the sprue tube.是什么意思_During this time, the screw moves back while turning to carry out a new proportioning by bringing material melted to the front of the sprue tube.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句