A.
z2=40、r2=200mm、ra2=205mm,rf2=190mm;p=31.42mm,s=15.71mm,a=300mm.
B.
z2=40、r2=400mm、ra2=405mm,rf2=390mm;p=31.42mm,s=15.71mm,a=600mm.
C.
z2=50、r2=500mm、ra2=520mm,rf2=475mm;p=31.42mm,s=15.71mm,a=700mm.
D.
z2=50、r2=250mm、ra2=260mm,rf2=237.5mm;p=31.42mm,s=15.71mm,a=350mm.