The effective cost dust content of molding sand should be determined according to time factors such as the quality of the coal dust, casting size and thickness, pouring temperature, lacing sand or unit sand, and so on.是什么意思_The effective cost dust content of molding sand should be determined according to time factors such as the quality of the coal dust, casting size and thickness, pouring temperature, lacing sand or unit sand, and so on.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句