A. ShipmentonDe31,2004 B. ShipmentbeforetheendofDe,2004 C. ShipmentonorbeforeJan.15th.,2004 D. ShipmentduringNov./De,2004 E. Shipmentwithin30daysafterreceiptofL/C
A. 有效功率 B. 轴功率 C. 配套功率
A. 反洗强度越大越好 B. 滤层膨胀率越高越好 C. 反洗时间越长越好 D. 反洗强度应掌握适当