GB/T 12459  异径三通 DN 150×150×20-Sch140TR80S

DN 20×20×150-Sch140 TR80S

SO450(A)-16 RF&=&ampamp

bl20-40t B005 RF=500ce

WN 65-100 FFmfm9CH80S4R0 L S

SP-15ruf00-1B)- hg/

wn300-300fmsch40625M-J S0Ⅱ6

bl80-63g000c b=RF20. MFM0 RJ3ch��

NB/T47021 RF550-0.6 δs=6=304 tf=300rfS@151

bii4000fuF