GB/T 12459  弯头 DN 50-Sch4090ES

DN 50-Sch40 90ES

WN 20-150 RF

WN 6"-150 RF Sch10S

B WN 800-300 RF S=5

SW 15(B)-16 RF 螺纹水线0(b)

WN100(B)-16 RF

BL 200-150 RF

DN 80-Ⅱ-4 90ES

wn32(b)-16m

PL600(B)-25TRF S=54R�RF8R RF Sch4 R7.5 RJ RF S1��线0(b)h160 H=580F@af sRjF5 RJ0u