熟女无套高潮内谢视频韩国,女人荫蒂全部过潮喷,老熟妇仑乱视频一区二,蜜芽忘忧草三区老狼大豆

5 station key life testing machine for flashlight

[usage]

This machine is widely used to test the service life of various keys

[principle]

This machine is a five-station key life testing machine, which uses the motor to drive the eccentric wheel to move the measuring rod left and right, so that the key and the probe have relative movement.

5 station key life testing machine for flashlight

[characteristics]

※ Good clamping method makes your test accurate and effective

※ Digital display counter, can count accurately, automatically stop when reaching the set number

5 station key life testing machine for flashlight

[Technical parameters]