GB/T 12459  弯头 DN 50-Ⅱ-8.890EL

DN 50-Ⅱ-8.8 90EL

pl250(b)-40rf

BL150-40 fFu00afT20592S)

DN80/PN10/01AO OS IH=366.6

pl 80-40 RFfã40rs60

WN 4"-150 RF Sch40Sb)-16rfF-19RFrfmc

WN 100-150 RF Sch40S40S

PL1200(B)-2.5 RF C

3 T 700-6.4 δ

WN 200(B)-100 FM Sch400-6.4 δ0=18 RF i4.0RF