GB/T 12459  异径三通 DN 800×800×90-Sch140TR3500=-R5ht61

DN 90×90×800-Sch140 TR3500=-R5ht61

WN250-600 FM Sch

wN50(B)-16 RF S=4

SO400B-10 RFch160/c0=80F=3.5/50n245 bb=273 cB=4

WN 450(B)-25 RF S=

PL200(B)-10 FF9FM/=4 s=c0-150RFRFcSchFFFR

WN150-16 RF S=3=2800-0.6F)-5(b)

WN80(B)-160MD=26

BL 20(B)-25 FMN=1204