A patent drawing for Duffy's Wave Motor.
达菲的波浪发电机的专利图。
A patent drawing for the Starr wave motor.
斯塔尔波浪发电机专利图。
This is almost certainly a patent drawing, but the number is not known.
这几乎可以肯定是专利绘画，但这个数目是不知道。
This is almost certainly a patent drawing, but the number is not known.
这几乎可以肯定是专利绘画，但这个数目是不知道。
应用推荐