Coil designation

What is the coil, the role of the use of the fact that we are not very understanding.
There are many different kinds of coils, many different names, and today we are going to learn about the name of the coil and the connection of its function or form

First, let's talk about the naming of the form

The coil is a square coil because it is shaped like a rectangle, and of course we have a square coil
The same coil, according to his purpose, has given it a new name
Like this coil used in IC card, ID card, so we call it the ICID coil.
Or because of its inductance, the difference in the diameter of the outer diameter used on other objects will have other names.
These names just to make you better distinguish, accurate to find the coil you need.
Other coils, please see the product page