The body is built from balsa wood, and the wings powered by a wire crank driven by a rubber band.

燕尾蝶的身体是用轻木做的，而翅膀的动力来源为用橡皮圈驱动的金属曲柄。

youdao

The flywheel which is driven by an electric motor and "V" belts stores energy that is used only during a small portion of the crank revolution namely during deformation of the material.

飞轮由电机和三角皮带驱动，飞轮积聚地能量仅在曲柄转动地小部分范围，即材 料变形地时候才释放出来。

youdao

The mechanism driven by a bidirectional pneumatic cylinder for climb robot is composed of two groups of slider-crank mechanism in series.

本机构由两组曲柄滑块机构串接而成，双作用气缸驱动，实现机械手的主爬升运动。

youdao