By balanced calculations of mass and heat,the DAP product of specification(13-18-0) is considered available,or if the MgO content in phosphate rock decreases to 1.57% from 3.23%,DAP product of excellent specification(15-42-0) possible.是什么意思_By balanced calculations of mass and heat,the DAP product of specification(13-18-0) is considered available,or if the MgO content in phosphate rock decreases to 1.57% from 3.23%,DAP product of excellent specification(15-42-0) possible.在线翻译_英语_读音_用法_例句