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Ordinary glass cleaning can just wipe one side, now we can make two glass wipe. one wiping outside, another wiping inside. Two glass wipe have been sucked by the strong magnet, when we wipe the inside glass then outside glass also can be wipe. Outside the glass eraser has a line connected with hand for safety wipe. And the glass wipe with drying function the glass will become dry when we finish the wipe.
Zeng Si Ming Li He Gang Liu Kuo