| 摘要 |
PURPOSE: Provided is an economical preparation method of spray type placard using rubber magnet. Conventional method uses expensive placard-making machine and raw materials to make placards of dye printing, thermoelectric fiber and picture printing. CONSTITUTION: The placard is made fast and easily by laying placard base cloth on iron plate working desk, covering it with paper cut figure or letters, sealing and fixing them with rubber magnet and spraying ink with air compressor spray machine.
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