Both these two new presses consist of form-closed eccentric-cam, so they have advantage of good function of reposition, concise structure and distinct effect in force-amplifying.

• 这两种创新的手动压力机，均采用了形封闭偏心凸轮机构，不需要外加复位装置，具有结构简单，增力效果显著等优点。