english for technical please help me to descripe the trampol

(english for technical)

please help me to descripe the trampoline machine technically.

(how it works & how to use) for each of them.

it has four main part

1-frame eather( upper frame or lower frame)

2-closure net

3-spring

4-mat

I\'II be much appreciated.

Solution

A trampoline is device consisting a strong fabric stretched over a steel frame with the help of coiled springs.

1- The Frame provides the rigidity and balance required for the device to take sufficient kinetic energy. It holds the fabric in place with the help of springs.

2- A closure net is a safety net. Making sure that the trampolinist does not injury himself in case the angle of jump is leading outside the ring.

3- There are trampolines with and with out coiled springs. The basic function of the spring is to provide enough rebouncing force to the trampolinist. Another function is to provide sufficient \'cushion\' to the trampolinist in case of a bad landing.

4- A mat is the main Fibre used for a trampoline, it is not elastic. The elasticity is provided only by the springs. They are generally made of woven polypropylene and is water proof.