HG/T 20615  法兰盖 BL 25-300 RF B wn400

BL25-300RF B wn400

pl350 b-25 rf S=1-140O100fh12020R

SO 100-300 RFH=5 h1=1

SO 80(B)-16 RF b=4096c/26 f1=3RF0RF65-12

BL500-25Mfah

WN 2"-150 RF Sch40-RFf gb/ B=261=)-16=6133.0mp0

WN 80-300 FM S=4 b=4

BL20-100 G)-10-1Rch40H22-pampn

PL25(A)-16 FF9.