Email format error
Email cannot be empty
Email already exists
6-20 characters(letters plus numbers only)
The password is inconsistent
Email format error
Email cannot be empty
Email does not exist
6-20 characters(letters plus numbers only)
The password is inconsistent
Window cleaning robots are small, autonomous machines that clean windows by using a spray of water and a squeegee. They are attached to a hose that provides them with water, and they typically move up and down the window, cleaning it as they go.