GB/T 12459  弯头 DN 250-28.5890EL8Rotlw Sch40�

DN 250-28.58 90EL8Rotlw Sch40�

WN40B-16M S=3.550FM0 R

wn40-2500 rf sch40�Р

WN3 50(B)-63 RF S=6

PL500(B)-16 RFFFM=4)-16 RF.420

BL 150-25 RF=19pampampa

法兰 SO20(B)-10RF

A WN 60"-300 RF B=Sch40

PL 25(B)-25 RFFM6 T/ RF-0.2

lwn200-2500 rj/m=3