GB/T 12459  同心异径管 DN 40×25-6RCrfRF RF¶RF0

DN 40×25-6 RCrfRF RF¶RF0

PJ/RJ 600(B)-16 RF

WN 800(B)-10 RF S=12

bl 450- 40 rfRF00RF102=930-1

1 FM 700-1.0 δs=12

1 RF 1200-0.6 δs=10

LWN25-63 RF B=25-4=80 B=0rf-sch41s10RFh40000

BL 1200-16 RF

SW 6"-150 RF

WN 12"-600 RF Sc20）F50 FF