GB/T 12459  偏心异径管 DN 200×10-Sch80SRES R00FF150

DN 200×10-Sch80S RES R00FF150

PL 25(B)-10 FF50 RF00-4.0

BL500(B)-2.5RF C-100 RF

SOP FF 10K 50A.980S=2

PL 500(B)-16 RF8025so300-4

WN500-16RF Sch30 sch4150RF00RF.4 b

PL15(B)-16 RFF1f50 r

DN2600-PN10 WN RF I I

WN 16"-600 ST Sch55920.25h30 B RF

BL5