GB/T 12459  同心异径管 DN 20×10-Ⅱ-4RC15-2-300 L

DN 20×10-Ⅱ-4 RC15-2-300 L

PL200b-10rf=F C-RF900-0.25r

3 RF 900-1..06 r40 B1=632/30RFf s=-

WN25(B)-25rfScA=108 Sbl200-2

PL50(B)-10 FF D=158 B1

WN50(B)-600 MS=7chrf3RF4 bch

pl65b-10rf1001法兰pl65(b)-10rf|化工c

PL100-10RF AA=0 RFSch4EQ Nh8hco/

B