A.β<α B.β=α C.β>α D.β≤α
A.采用圆柱滚子轴承 B.内大外小 C.外大内小 D.一样大
A.n1+αn2+(1+α)n3=0 B.n1-αn2-(1+α)n3=0 C.n1+αn2-(1+α)n3=0 D.n1-αn2+(1+α)n3=0