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2020-11-02
What is the eraser made of? What do you need to pay attention to when using it
The eraser is made of PVC material, but the plasticizer ATBC is added. That is, using physical principles (non···
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2020-11-02
The structure and principle of stationery syringe pen
The ink of the syringe pen flows out of the tube as a result of air pressure and gravity. The air entering the···
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2020-11-02
What are the 4 tips for selecting stationery
1. Pay attention to sharp stationery. Stationery, such as painting rulers, pencil cases, etc., must not have b···
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2020-11-01
What are the office stationery
1. Stationery supplies 1. Document file management: Folders with holes (two-hole and three-hole folders), non-···