GB/T 12459  同心异径管 DN 50×25-Ⅱ-6RC

DN 50×25-Ⅱ-6 RC

pl700(a)-2.5rf1001æ—&&a

WN 6"-300 RF S=FF80CHF

SO 50-16 RF00sc0171T0hSR

WN32(B)-16 FMch16(a)0S00-4.0/146-24529012rfM74

BL 40-150 RF

WN 300(B)-25 RF S=2.5

PJ/RJ 500(B)-16RFh800 c=30 bb=824 k=¢

SO 100(B)-40 FM

WN 4&qu