A.20 C.r B.45 C.T7
錐度=(D-D./L =(90-84.5)/110=1:20 錐度是1:20
A.磨削 B.車削 C.刨削
二茬輥輥徑=430MM-5MM=425MM
A.bearing B.bear C.bera
3500×(1+18%)=6300噸/孔