by Weiyu Li
As the time goes, the shells of the electronic products can protect our phones, laptops in many different kinds of ways, water-proof, drop proof, and even bullet proof, these are the high-tec of today's engineering.
Now, let me give you some examples of the functions I exampled just now.
Waterproof is simple in technology way because just make the phone in a kind of close space which the water can't get into that so the phone is waterproof. Many phones can get to this field now such as iPhone, Huawei, Sony and so on.
Drop proof focus more on the material of the shell and the robustness of all parts inside the phone. Nowdays, smart phones can be drop proof as well. These hardy devices can survive a coffee deluge or a drop on the asphalt, yet don’t look like they’re designed to go to war.
In China, there is a joke, if you have NOKIA, you can rule the world. This joke really shows how hard the NOKIA phone is. In high school, I saw a friend of mine slammed his NOKIA hard on the ground, and then received a phone call like normal in person. I also used my NOKIA i7 to push the nails in the wooden borad, sounds crazy? But that's true.
resource just from google and self-experience
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