GB/T 12459  弯头 DN 250-Sch40S90EL1=34

DN 250-Sch40S 90EL1=34

pl125-16rf b=4/

2 FF 2200-0.6 δ100c3/

WN 480(B)-16 RF500 FF /data0/6h60.0

WN 125-600 M RF860-1.52.53@4M 9Ffm40 RFM Sch80S0

BL80-300FMRF h1)-25�

WN FF 5K 150A0-16 rf4043.53@4M 9Ffm40 RFM Sch80S0

PL50(A)-10 RF8-19)-16 Rh

PL3