GB/T 12459  弯头 DN 250-Sch4090EL4066rf00r10 �

DN250-Sch40 90EL4066rf00r10 �

pL300(B)-16 RF00)-25.600

WN 500-16 RF S=10

WN150(A)-100M S=7.1

NB/T47022C- RF1200-1.

WN 2"-150 RF Sch1600 RF Sch40S RFR SCH40S50RJ00@c4-0

WN20-1500 M Sch80S

Bl80-100RF0H40S-=2/

WN 1 1/2"-150 RF Sch160

wn200(