HG/T 20592  法兰 PL 500-16 RF3 CR bl450-25rf RFRFF.7175 d=1=1301rf0-1FFÂ.70FF1

PL500-16RF3 CR bl450-25rf RFRFF.7175 d=1=1301rf0-1FFÂ.70FF1

SO 500-300 RFch80

pl32(B)-6RF00 RF-)-2RF50Ãrf-16 RF150/CH84Æ’164

WN450-150 RF B=1

SO 300(B)-16RFRFRFF.0-1O/MF)-F=1

WN100-160RJ S=4.5RF SCH4ch

WN50(A)-10 RF S=5.5 rf

PL 100(B)-16 RF

WN 2