Marman clamp

A marman clamp is a special kind of clamp that's used to hold two things together really tightly. It's named after a guy named Ernst Marman, who invented it a long time ago.

Picture a round tube and a flat plate that you want to connect together. First, you put the round tube through the middle of the clamp. Then, you slide the flat plate up against it, so it's touching the clamp too.

Here's where things get interesting: there are two halves to the clamp. One half is the "male" part, and the other half is the "female" part. The two halves fit together perfectly like puzzle pieces, and when you tighten a bolt in the middle, the two halves squeeze together and grab onto the tube and plate really tightly.

Because of this, a marman clamp is used in places where things need to be held together really securely -- like in airplanes! They're especially useful for parts of planes that need to stay connected even when the plane is going through lots of turbulence or changes in temperature.

So, next time you're flying on a plane, you can look out the window and know that a marman clamp is helping to keep you up in the sky!