GB/T 12459  弯头 DN 80-690ES50 RF B0ذ�000RGRF006mDF

DN 80-6 90ES50 RF B0ذ�000RGRF006mDF

WN65-300Rf s010RF10rkF10RJ

PL65(A)-16 RF b=4 n=4

PL300(B)- 10RF4-140T20615

pl150 -10rfg/500-16 RFËóthg

WN25-150FM

BL500(A)-6RFtps:SF

wn20(B)-63m00-1.6p

JWN 25×50(B)-25RF S=3.2

PL200(B)-40RFFM3/@0FFRF.5.0 ï؟