GB/T 12459  弯头 DN 50-Ⅱ-3.590ELf0/6400-4.00

DN 50-Ⅱ-3.5 90ELf0/6400-4.00

WN150-150RFSch40S=3A=1/-0 A=6/1H=161f

WN 20(B)-16 RF

WN 50-900 RF Sch120

WN500-25RFb=225(B)-10RFS0-

a 2900s00-150 RF30

BL 4"-600 RF

BL100-16 RF60hPL 500(A)-6 RF 85018RFSCH40S1000-6/48-13005

PL 50(A)-25 RF b=4

WN450