A washer that prevents the round nut from loosening. Widely used in electrical appliances, elevators, mechanical matching above, used to fix rolling bearings to prevent loosening. We have to see whether the width of the gasket of the check washer is consistent with the width of the circular surface on the chamfered side, and then see that the "eight claws" on the check washer have a certain angle.

The vending machine motor drive receives satellite signals, so there are satellite receiving modules; GPS navigation only serves the driver, the equipment does not need to install other facilities, and GPS positioning in addition to serving the driver, but also to serve the driver (vehicle) manager, need to establish the vehicle and management center information channels, so also need communication channels.

Be sure to install a mobile phone card. Smart vending machines can be placed in and out of the store and on the street. The return on investment is obvious, the maintenance cost is cheaper, and the investment in equipment and facilities is faster. As an important link to grasp the lifeblood of the industry, the progress of hardware mold development is unbalanced. Without the low cost of domestic molds, there will be no rapid development of domestic brand cars, which has been recognized by everyone.