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What modifications can be made to an excavator? #PopularScience #Unzip #LargeMachinery #Excavator
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An ordinary high school chemistry teacher encountered a "live" geography question while traveling?!
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High school student
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Speed bump!! Amazing machinery~
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How are mooring ropes secured? #Science #Unzip #MooringRopes #Ship
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Why is steel colored after cutting? #Science #Unzip #Metalworking #CoolKnowledge
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Super cool mechanical series of speed bumps! 7.18
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Gear machining: Why only a tiny bit of cutting is required? #Science #Unzip #Machinery #ExtremeComfo
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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 are the joints of steel cables so strong? #Science #Unzip #SteelCable #MachineryManufacturing #E
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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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Super cool mechanical series of speed bumps!
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How sexy is sexy lingerie?
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The Fertilization Process of Sperm and Egg
How to lay a qualified asphalt road? #Science #Unzip #Paving #Knowledge
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Are the videos we watched fake? Has wild sex education been fooling us all these years?
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Why doesn't it hurt when a needle is stuck in my finger?
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Don't pick your belly button after taking a shower
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Continuing from the previous episode, we completed the construction of a beautiful 2-story mini vill
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Making a 10m Underground Tunnel/Swimming Pool by Hand
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