An official briefcase, also known as a briefcase, is a narrow box-shaped bag that is primarily used to store paper and other documents. Lawyers often use briefcases to store case files and businessmen...
There are various types of scissors, depending on the use of the product, mainly gardening scissors, tailoring scissors, art scissors, office scissors, industrial scissors, cooking scissors, etc. The ...
Ⅰ. The structure and principle of the ballpoint ballpenThe writing principle of the ballpoint ballpen is mainly to use the friction force generated by the direct contact between the ball and the paper...
A school bag refers to a bag made of cloth, leather, etc., which is used to carry textbooks and stationery. According to the change in consumers' aesthetic taste, school bags have developed a scho...
1. Stationery office equipment whiteboard pen is classified by inkAccording to the ink, whiteboard pens on the market can be roughly divided into ordinary whiteboard pen ink, dry-erase film-forming wh...
Modern electronic calculators are hand-held electronic machines that can perform mathematical operations. They have integrated circuit chips, but their structure is much simpler than that of computers...
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