弯头 DN 500-Ⅱ-Sch4090ES

DN 500-Ⅱ-Sch40 90ES

NB/T47021 C-RF900-0.25rf =130 S=3 7=3.5

wn200-300rfsch.40mpF

BL600(A)-6 RF C=RF S=87.1f.=R

BL400-100 RJ C=9600 rf sch805Rso80(/1/00

PL350A-10 RF=3

wn100-40RF Sch/

LWN450-600RF B=444

so20(B)-16fm

PL 50(B)-16 RF S=6RF390/T20592