Why is cliff jumping more dangerous? #PopularScience #Relaxing #ExtremeSports #Skydiving #Trivia

Why can you pull out a pillar stuck in the ground by wrapping it around an iron chain? #Science #Unz

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A gadget from the 1920s, but no one uses blades anymore

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Why do we cut trees at height? Will there be accidents? #高空伐木 #解压 #科普

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Not only sea buttocks, but also small steamed buns

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This tool is good

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

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Why did the steel fly so high in the flying steel accident? #Science #Unzip #RollingSteel #FlyingSte

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Can cliff skiing cause an avalanche? #Science #Unwind #CliffSkiing #Avalanche #Trivia

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

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Why can the fountain stone ball rotate? #Popular Science #Unzip #Physics #Fountain Stone Ball #Trivi

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Why do we need to cut a slant on the tree when felling it?

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How are mooring ropes secured? #Science #Unzip #MooringRopes #Ship

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How harsh is the environment on a polar research vessel? #PopularScience #Unzip #ResearchShip #Polar

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

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What modifications can be made to an excavator? #PopularScience #Unzip #LargeMachinery #Excavator

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Why does a well spout gas? #Science #StressRelief #Drilling #Well Blowout #FunFacts

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【OK Dance】ok dance earned it cover dance choreography Kunming hip-hop, Kunming jazz, Kunming Korean

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There Shouldn't Be Any Negative Reviews for This Product in Taobao

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

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[Sports]Skydiving parkour from a high altitude perspective

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