论文部分内容阅读
也许有人会对笔帽上的小孔感到很奇怪,笔帽为什么要留一个小孔呢?其实,这个小孔是可以救命的。孩子们很调皮,总喜欢用嘴叼着圆珠笔,一不小心就会发生误吞圆珠笔的危险事件。为了做好此项安全防护,国家文教用品质量监督检验中心曾做过一项实验,实验对象就是学生们常用的圆珠笔笔帽。实验人员用一根橡胶管模拟人体呼吸道,先将一个顶端无空气孔的笔帽塞进管中,模拟人不小心吞咽笔帽的情况,然后对胶管一端充气。结果
Maybe someone will feel very strange on the cap on the cap, pen cap Why leave a hole? In fact, this hole is life-saving. Children are naughty, always like to hold their ballpoint pen mouth, accidentally swallowed ballpoint pen can happen dangerous incident. In order to do this safety protection, the National Culture and Education Center for Quality Supervision and Inspection has done an experiment, the object of the experiment is the students commonly used ballpoint pen cap. The experimenter used a rubber tube to simulate the human respiratory tract. First, a pen cap with no air hole at the top was inserted into the tube to simulate a situation where the cap was inadvertently swallowed and inflated at one end of the tube. result