How are Nixie tubes made? Why haven't the once-popular counting bulbs disappeared?

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The slowest aircraft in the world, F1D, has a thin layer of material, but can fly in the sky for 40

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The slowest aircraft in the world, F1D, has a thin layer of material, but can fly in the sky for 40

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Why do CNC engraving machines make seasoned craftsmen both love and hate them?

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Why do CNC engraving machines make seasoned craftsmen both love and hate them?

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Decompression video of the workers series!

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Decompression video of the workers series!

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Speed Bump!! Skilled Workers Series

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Speed Bump!! Skilled Workers Series

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Let's take a look at the amazing workplace of skilled workers!

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Let's take a look at the amazing workplace of skilled workers!

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Today's stress-relief video!! Worker series ~2.10

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Today's stress-relief video!! Worker series ~2.10

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Speed Bump Workers Series 9.18

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Speed Bump Workers Series 9.18

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Why do two people need to swing the hammer when forging iron? #Science #Unzip #Ironmaking #Forging #

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Why do two people need to swing the hammer when forging iron? #Science #Unzip #Ironmaking #Forging #

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The first step after a burn is not to go to the hospital immediately!

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The first step after a burn is not to go to the hospital immediately!

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Why do we need to grind off the bark? This is the process of peeling and rounding the wood before pe

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Why do we need to grind off the bark? This is the process of peeling and rounding the wood before pe

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Why doesn't it hurt when a needle is stuck in my finger?

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Why doesn't it hurt when a needle is stuck in my finger?

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Yemen is the first country to be destroyed by drugs, even children are not spared. How tragic is it?

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Yemen is the first country to be destroyed by drugs, even children are not spared. How tragic is it?

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How sexy is sexy lingerie?

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How sexy is sexy lingerie?

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Convex lens experiment

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Convex lens experiment

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What is "porcelain mending"? Put a copper nail in the crack and hit it, and an interesting phenomeno

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What is "porcelain mending"? Put a copper nail in the crack and hit it, and an interesting phenomeno

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The stickiest couple: erasers and rulers! Why do they always stick together? They even melt.

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The stickiest couple: erasers and rulers! Why do they always stick together? They even melt.

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What is "scratch holography"? Aim the scratch at the light and something interesting happens!

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What is "scratch holography"? Aim the scratch at the light and something interesting happens!

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Why is curling so expensive at 12,000 yuan per piece? Only three companies in the world can make it.

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Why is curling so expensive at 12,000 yuan per piece? Only three companies in the world can make it.

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What is the "thermoacoustic effect"? Scientists built a refrigerator using noise. Do you know how it

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What is the "thermoacoustic effect"? Scientists built a refrigerator using noise. Do you know how it

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How black is the blackest substance in the world? Can you imagine that it can make objects invisible

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How black is the blackest substance in the world? Can you imagine that it can make objects invisible

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