GB/T 12459  弯头 DN 150-Sch4090ES

DN150-I-Sch40 90ES

WN 125-40 T

DN 300×200-Ⅱ-4 RC�©б╘п╠0

DN50-Class150 WN RF Sch10S=75-=3 rf s=3.2

WN 100-1500 RJ

SO 65(B)-16 RF

PL 32(B)-16 RF

a 1800PL-150 RF-16m�в

SO300(B)-10 FM B1=/

1 rf 600-1-F10.RF0��77.5 RJ R1cB00RFpampamp516