... *8*H112,O,F5-4020-180GB/T4437.1GJB2381 GB/T44372*,6*7*H112,F,O,T4,T6 Tube and pipe (Thin ... *H112,O,F5-4020-180 GB/T4437.1GJB2381 GB/T44372*,6*7*H112,F,O,T4,T6 Tube and pipe (Thin ... )Adopted standard1*,3*,5*O,H14,H34,H320.5-56-130 GB/T6893 aluminum forging products