NB/T 47021  法兰 FM 800-1.6 δs=6

1 FM 800-1.6 δs=6

47021 rf1100-0.6 ãƒ

47023 FM1800-2.5/(

bâ… 500-s /@bl100-150 rf/

47023 rf500-1.6/1070FN50B-

47023FM400-2.5/44 RF0a)0@R52)/Sf566160S

wn80-900FMä8ampamp400A7400

SO50-25 Ghrf rf040 RF/27/ FMf/u

so25(b)-25 rf b=3 R

SO3