GB/T 12459  异径四通 DN 20×20×15-Sch80SCRR

DN 20×20×15-Sch80S CRR

47021 RF300-1.6

WN 900-150 RF S0-1.6S=1

WN80(B)-10 RJrfA-1ГӮ4

WN200(B)-63FM S=6.2--1RF sN

so400(a)-16RJ/6 s0 RF10l021

Pl 350-10 RF SR10rfS20/50

WN80-150 rf CH0hCH400951.0-11

WN250(B)-40FM0

WN25-25RFS=3.552/8-FM S/2 k=50 RF