摩擦传动方程
equation for frictional driving
谐波摩擦传动
harmonic friction drive
Harmonic friction driving
harmonic friction transmission
the harmonic friction drive
钢带摩擦传动
Frictional steel belt transmission
滚动摩擦传动
roll friction transmission
滚筒摩擦传动
cylinder frictional drive
三波谐波摩擦传动
Three-wave Harmonic Friction Drive
扭轮摩擦传动
Twist-roller Frictional Transmission