论文部分内容阅读
便携式灭火器的外观看起来像个U盘,外壳上绘制了各种花纹,非常美观。人们可以根据自己的喜好,随意挑选不同的款式。这种灭火器里面有一个小瓶子,瓶子里面装满了浓缩干粉。前面、后面和上
The appearance of the portable fire extinguisher looks like a U disk. Various patterns are drawn on the shell and it is very beautiful. People can choose different styles according to their own preferences. Inside the fire extinguisher is a small bottle filled with concentrated dry powder. Front, back, and up