GB/T 12459  异径三通 DN 800×800×40-Sch20TR77.5 b=88.9 n=11r

DN 40×40×800-Sch20 TR77.5 b=88.9 n=11r

B WN 1000-150 RF650=7h80S

BL150-150 RF undefined=214CH4020/1/

3fm500-1.01055

bl250-160g6RF1MF4260d=

WN 80(B)-16 FM S=600 RF R

WN 80-150 RF S=S=4

BL 25-160 FM S＝8.840

wn300-900rf sc

so250(b)-16 m2/-1.084 A600