GB/T 12459  弯头 DN 20-490ES

DN 20-4 90ES

LWN 2"-300 RF

WN 25(B)-25 RF Sch80S

WN 500-300 FM Sch80

PL 25(B)-6 RF

WN80-150 RF

pl40-16rf

DN50-PN10 PL/P-A RF I S=8

WN50-150 RF

pl25-16rfRF S=6h40S4 S=46RF S=50-280 HjH80S/uΞ)-1RFb=RG0SB)-25ذ°0 rfRschf�3h=931671=10FB1=6 RF-16