GB/T 12459  同心异径管 DN 50×40-Sch80SRCpvletM/1/-

DN 50×40-Sch80S RCpvletM/1/-

BL25(B)-16 RF1/FNS=8Ns400-6.40

SO50(B)-25RF/-16S=700-1.0/50F0s RF@0fm 50/64

SO 65-150 RF

PL50B-16MFls16fm0r=H R0

SO 32-300 RF-16r11.91RR

WN 50(B)-16 RF Sch40S

WN 400(B)-63 FM

WN250(B)-16RF S=9N=288

WN 1"-150 RF Sch1