2021-01-28
| The spray bottle is a very useful device. It is a good example of the basic principle of pipe pumping. 1. See if the transparency of the bottle is bright and transparent, whether there are black spots or foreign matter, if it is mixed with recycled materials, almost every bottle will have black or other colored impurities, such a bottle must not be used. 2. Smell whether the bottle has a peculiar smell. If there is a peculiar smell, it may be made of recycled materials. 3. Touch the texture with your hand, the new material will "pop" and the texture of the returned material will be worse. |
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