GB/T 12459  弯头 DN 500-Sch2090ELblH8RF16@40H

DN 500-Sch20 90ELblH8RF16@40H

WN 65(B)-63 RJ Sch40S

WN25-16 FM40-150rfRF

wn200(b)-150 rf sch40

47021 fm450-1.0 sï¼ 5

wn50 -300rf)�7.5F@F�F@0F0J2S00-110/

PL650-16RFRJ SCH4b)-16 r

PL600(B)-16 G Y=

WN 50(B)-100 M S=820615ุฎ

so20-900rfmqu