GB/T 12459  弯头 DN 500-1390ESCH4 P(b)-10a3Ftg1/2

DN 500-13 90ESCH4 P(b)-10a3Ftg1/2

PL200(B)-6 FF C=10 BB=350

BL1 1/2"-150 RF Sch40

so50-16 RF

WN100(A)-63 RF S=5.0

&ampamp;quot;wn100-300rf s=8

SO 600(B)-10 RF

47022 fm1400-1.6/103-300

so450(a)-16 rf&ampampampampampampampampampampampam