GB/T 12459  偏心异径管 DN 450×10-Sch40SREpampampquothffRF=179bl2���

DN 450×10-Sch40S REpampampquothffRF=179bl2���

WN40(B)-100 MFM700-1.0b=20

WN 600-150 RFR-16RFF0(b)-16rf8.05 FM

WN25B)-63Mf5-16B)-300 RF*82

PL100(B)-16fFs=7 S=

wn80-63m sfFRFRF5=M TRH40S16

TPB-1* δ=125 RFFc

bl20-63rj14Sch42000-10am20

wn250 - 40