Particle sizes of pulverized coals are analyzed by Malvern MAM 5004 Laser Mastersizer made in United Kingdom.煤样的颗粒粒度由英国Malvern公司的MAM5004型激光粒度分析仪测定.The museum's P.R. man was going to be dragged over the coals for sur...
It is important to get the coals white-hot before you start.在动手之前把炭火烧旺很重要。It is important to get the coals white-hot before you start cooking.很重要的一点是要把煤块烧到白热状再开始做饭。The iron teakettle was hissing splendidly over live coal...