拨禾轮圆周速度与收割机前进速度之比的英文

reel speed ratio

• 拨:    move with hand,foo ...
• 禾:    standing grain mil ...
• 圆周:    circumference; cir ...
• 速度:    velocity; speed; b ...
• 与:    take part in; part ...
• 收割机:    harvester; harvest ...
• 前进:    advance; go forwar ...
• 比:    2