How do different pens work? Let's take a look at how they work under a macro lens. #pen#decompressio

My pen can transform—what about yours?

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Highlighter rolled up too? ｜Dianshi fragrance highlighter color test｜Handwriting voice control｜White

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Car Disassembly Video

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Magical stationery for “poor students”!

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【Ten Color Numbers I Often Use】Paperless Learning｜Learning Good Things｜Not Voice Control｜

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They say diamonds are forever, but they can be burned and broken.

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Why is steel colored after cutting? #Science #Unzip #Metalworking #CoolKnowledge

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The wisdom of the working people is to change the direction of force to move heavy objects. #Science

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Why do we say that no two pairs of ripped jeans are exactly alike? #Science #Unzip #Jeans #Workers #

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Why do we need to install a wellbore when digging a well? #Science #Unzip #IncreaseKnowledge #Diggin

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Why does the bearing emit "hot air" when installing it? This is the interference fit installation me

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Why is the blade of a gantry shear angled? #Science #StressRelief #HeavyMachinery #GantryShear #FunF

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You don't necessarily have to go to the ocean to surf—surf simulators and artificial wave pools can

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Why do rock slabs need to be broken manually? #Science #Unzip #Construction #Cool Knowledge

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Use inertia to remove parts. #PopularScience #Unzip #Inertia #SlidingHammer

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Learn a few handy tips for hardware tools—don't miss out!

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Why do we add a layer of metal between the hammer head and the wooden handle? #Science #StressRelief

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How to lay a qualified asphalt road? #Science #Unzip #Paving #Knowledge

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Some lawns are dyed green, and others have their turf replaced in patches.

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Why are the joints of steel cables so strong? #Science #Unzip #SteelCable #MachineryManufacturing #E

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