As we all know, from primary school, our life is inseparable from the existence of fountain pen. In order to prevent some students from being too naughty, they always like to bite the pen cap, which leads to careless swallowing, which is easy to cause suffocation!

In addition, when the pen holder is inserted into the pen cap, the small hole will discharge the air in the pen cap to balance the air pressure so that the pen holder can be pulled out and inserted; At the same time, the small hole has good ventilation, which can prevent the ink in the pen holder from forming a vacuum without oil after falling, so as to ensure smooth oil discharge and smooth writing.

If there are really naughty ghosts around you who swallowed it by mistake, it's best to use Heimlich first aid in time before the doctor arrives!

(WeChat official account of "广东科普科技有限公司"， to bring you more interesting information about stationery.)

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