GB/T 12459  同心异径管 DN 50×25-6RC�u0083/data/public/common

WN200-150RF-As

WN 50(A)-63 RF S=5 A=5

WN200-150RF0.6 Ã bb=7

WN600-150 RFSch40/T2.52HG=T215‚2

bl300(a)-10rf4ovbesrf0-1.0160RF Sch160

WN25(B)-160 RF50u0RFS300S/00-1.0/J6RFRFF10

wn 32-150 RF RF0C)-

wn350-150rf sch60g5(A)-63 RF S=7

耳座 C40 c=1SCH80S