( 1) Accurate transmission, without having to worry about when working cause sliding, has the relative stability of the speed ratio; ( 2) Transmission efficiency is very high, can reach above 95%. Zui effect is superior energy efficiency: maintenance is very convenient, do not need to use artificial lubrication and maintenance costs are relatively low; ( 3) Faster than a large area, theoretical speed can reach 1:10, thread speeds of up to 50 m/s, has the very big power rotation, instantaneous can achieve kw; ( 4) Can be applied to relatively long-term regional transmission, center distance can within 10 m.