GB/T 12459  弯头 DN 300-Ⅱ-790ES

DN 300-Ⅱ-7 90ES

PL150(A)-16 RF f1=3 b=

B WN 10"-150 SMS�77.5

WN40-63FMchrf

DN250-PN63 WN M

WN 20(B)-40 M S=3

DN700-PN10 PL RF Ⅱ

2 RF 700-2.5 δ1=18

SO80-40 FM16

PL 25(A)-6 RFRF 0ch40Fp.5/foru5/foru70 FFRF SC b-63tf00 rJ B=tmf/pFF0 RF20 RFA