Why do we add glass slag to metal when smelting it?

Today at home, I simulated ancient gold coin casting.

baocanglierendongzhen

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

haoqiwanhuatong

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

haoqiwanhuatong

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As long as you use the right method, work won't be that tiring.

haoyongwujingongju

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Water will flow uphill

haoyongwujingongju

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Cars can encounter many troubles in icy and snowy weather. Which ones have you encountered?

haoqiwanhuatong

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Why can firecrackers restore the shape of oil barrels? This is because of the instantaneous pressure

haoqiwanhuatong

9 Views

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

haoqiwanhuatong

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Why do sprinkler heads keep knocking when irrigating farmland? #Science #Decompression #Irrigation #

haoqiwanhuatong

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

haoqiwanhuatong

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

haoqiwanhuatong

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

haoqiwanhuatong

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

haoqiwanhuatong

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Why can loose sand be made into sand sculptures after mixing with water?

haoqiwanhuatong

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

haoqiwanhuatong

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【Good News for Insomnia】Looping Video

Jinzhengmeiyongde

12 Views

Why not turn off the water when repairing a pipe? This is called pressure plugging. #Science #Unzip

haoqiwanhuatong

9 Views

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

haoqiwanhuatong

9 Views

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

haoqiwanhuatong

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

haoqiwanhuatong

14 Views