GB/T 12459  弯头 DN 500-890ESF S=6.51000

DN 500-8 90ESF S=6.51000

BL 800-150 RF Sch10S116RF10SSch225 δR-2 TR

WN250(B)-16 RF N

WN 15(B)-40 FM S=4.0RF0 RFF06 R0-2.5f.5-sh1055.041f1R5

47023-2012 fm800-1

Wn15(B)-16 RF思150F00urce10

DN700-PN25 WN M Ⅱ Sch

BL50-25 Fm/4

BL40(b)-63T/s=8s=7.406 S