A.圓錐齒輪 B.行星齒輪 C.圓柱齒輪
A.u=220sin(314t+30°) B.u=220sin(314t-30°) C.u=220 sin(314t+30°)
A、I1>I2 B、I1<I2 C、U1>U2 D、U1<U2