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You keep hearing “polypropylene vs polyethylene” and wonder which one is better for your project. Both plastics show

Fire moves fast, and most plastics melt or drip like a candle wick. To keep our gadgets, toys,

Have you ever wondered what makes a pen click smoothly, a gear spin quietly, or a seatbelt latch

You grabbed a desktop printer, saw liquid resin ads, and heard about lasers fusing metal dust. Now you’re