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How Master Cylinders and Combination Valves Work
auto.howstuffworks.com/auto-parts/brakes/brake-types/master-brake.htm
The master cylinder provides the pressure that engages your car brakes. Learn how the master cylinder works with the combination valve to make sure you can brake safely.
How to Remove Red Stamp Pad, Red Ballpoint Pen, and Red Ink Stains
home.howstuffworks.com/how-to-remove-red-stamp-pad-red-ballpoint-pen-and-red-ink-stains.htm
Removing red ink stains can a real nightmare. Read on to learn ink stain removal techniques to wash, sponge, and soak these stubborn stains right out of your carpet, concrete, or laundry.
How to Get Detergent Stains Out of Clothes
home.howstuffworks.com/how-to-remove-soap-spots.htm
Soap is supposed to be a cleaning agent, but if you get it on the wrong surface it can quickly become a staining agent. Follow these stain removal tips to clean up soap spots.
How Solar-powered Backpacks Work
electronics.howstuffworks.com/gadgets/travel/solar-powered-backpack.htm
Solar-powered backpacks are great travel gadgets. Learn more about solar-powered backpacks at HowStuffWorks.
What can I do to my roof to save on energy costs?
home.howstuffworks.com/home-improvement/heating-and-cooling/roof-energy-costs.htm
Your roof and energy costs go hand in hand. There's much you can do to save money and lessen your global impact. Learn about your roof and energy costs.
What is St. Elmo's Fire?
science.howstuffworks.com/nature/climate-weather/atmospheric/st-elmo-fire.htm
St. Elmo's Fire is a weather phenomena that often appears on the masts of ships and the wings of airplanes. Learn about St. Elmo's Fire and plama.
Stored Energy Methods (Other Than Rechargeable Batteries)
science.howstuffworks.com/environmental/energy/question247.htm
One way to store energy is to use a battery, but what other ways can we store energy? Learn about different ways to store energy at HowStuffWorks.
How Flexplay DVDs Work
electronics.howstuffworks.com/flexplay.htm
Flexplay dvd rentals allow you to rent dvds and watch them when you want without returning them. Learn more about Flexplay dvd rentals in this article.
Screws
home.howstuffworks.com/screws.htm
Screws have a few benefits over other fasteners -- they provide lots of strength and can be easily removed. Find out about different types of screws.
The Ultimate 3-D Printing Quiz
play.howstuffworks.com/quiz/3-d-printing-quiz
Regular printers are pretty handy, but their up-and-coming cousins, 3-D printers, add a whole new dimension to the printing process. Literally! How much do you know about the fascinating field of 3-D printing? Take this quiz and find out!