How a fire sprinkler works
11:29
Fire Sprinkler Systems Explained
7:31
How a Fire Sprinkler Works at 100,000fps - The Slow Mo Guys
11:12
The Impact Sprinkler - more clever than it seems!
16:41
How French Drains Work
12:53
Pin tumbler lock & Disc detainer lock (How they work)
14:41
How 3 Phase Power works: why 3 phases?
17:58
The Incredible Strength of Bolted Joints
5:57