How Medical Needles Are Really Made
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YouTubeInstant Curiosity
How Medical Needles Are Really Made
When you look closely at a medical needle, it seems impossible to drill a hole that perfectly small. And that's because no one actually drills it. Most people assume they use microscopic drills, but they actually start with a thick steel pipe that already has a large hole inside. To shrink it down, machines pull the pipe through a tiny funnel ...
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