GB/T 12459  弯头 DN 900-Ⅱ-490ELFF A=4061)-@

DN900-Ⅱ-4 90ELFF A=4061)-@

BL300-150 FMFMF99���5 RJ-1671@S RIM0f4504.075 h= SC,δ)1

PL80-10FF D=190 K=

3 M 1300-2.5 δ0=12

B WN 700-300 RF B=780RF

AWN800-150RF S=10Sf82

PL300(B)-16 RFRFMF00R PL8l015

a130060059-1 FF C=16

WN 65-300 T S=5506o

4