GB/T 12459  偏心异径管 DN 650×15-Sch40RERF SCH�0sb5 RJ-.5RFC�0sb5 R

DN 650×15-Sch40 RERF SCH�0sb5 RJ-.5RFC�0sb5 R

wn20B)-63RF/mc-.

pl25(a)-25fm/ rcG56

WN 50-150 RF S=5.5/data

WN 1600(B)-6 RF S=4

BL450(B)-40 M Rf4/

BL65-100G7021 RFrf202R

WN 300-150 RF S=100-

BI 700ذ ذپذ’آ·ذ â€™ذ’آ·ذ ذپذ�