GB/T 12459  同心异径管 DN 500×300-18RC

DN 500×300-18 RC

SO 32-150 RF0 K0 R@WN1

BI 500-1.0

3 CM 3000-1.6

WN3/4"-150 FF

SO 500-150 RF40sH�� RF��500 S@40@RF60RF Sch

bii 4000-s

SO 15(B)-16 RFF&@t.5 RJ RFpaFch��@4RF5 RJ-160 RF0000F��SCF&@06/

WN2"-300 RFSfRF0

PL200(B)