GB/T 12459  弯头 DN 50-690EL(b23m-

DN 50-6 90EL(b23m-

3 RF 1100-1.6 δ0=17c h=10816 D=10RF0-110

DN40-PN100 WN M Ⅱ

WN25-25G50-63rf1.6500RJ/u00

bl750-900RF

1 RF1200-0.25 *=3f s=CHf0"-1500 RJ Sch16

BL200-63Tc3)-10rfF S/.6

WN 150(B)-25 RF S=7.5u00c6/u03fmpampam

BL25-100M=34 S

WN 80