Difference between Compressor , Blower , Fan ...???

Compressor:
Compressor is a mechanical device that increases the pressure of a fluid, either gas or liquid by reducing its volume. The inlet diameter of the pipe will be more than the outlet diameter. This reduces the volume flow rate and thus the pressure of the fluid increases. Thermodynamically, low pressure high volume in the Inlet becomes high pressure low volume at the outlet. Compressor are mainly used for fluid flow at high pressures i.e, the inlet pressure will be low while inlet volume will be high and outlet pressure will be high while outlet volume will be low. There are many types of compressor based on the different principles of working such as 
1. Rotary Compressor
2. Reciprocatory Compressor
3. Centrifugal Compressor
4. Axial Compressor
Compressors are extensively used in refrigerator, air conditioner, pipeline transport of natural gas, petrol refineries, pneumatic compressors are used in industries.

Blower:
Blower is also known as "Centrifugal Fan". This fan increases the velocity of air or gas when it is passed into the impellers. The inlet pressure will be low and the outlet pressure will be high. At constant volume flow rate, the low pressure air becomes high pressure at the outlet. This is mainly due to the rotating blades in the impeller. The kinetic energy of the blades increases the pressure of the air at the outlet. Blowers are mainly used for industry purposes and in climatic control after fan due to its high pressure than fan

Fan:
Fan is a machine used to create a fluid flow. The flow of fluid is increased with the fan. It produces high volume and low pressure than the ambient conditions. It is mainly used as cooling device in computer CPUs and other electronic gadgets apart from climatic condition control.

Main difference between Fan and Blower is blower can achieve more pressure ratio than fan. Blowers can produce more high pressured air than fan. 

Difference between Compressor and Blower - Compressor produces high pressure at low volumes where as blower produces low pressure at high volumes.

What is Festoon Cable ?

Let’s start with the name — ‘festoon’ is a word that often refers to something suspended in a curve between two points.Simply put, festoon cable is a flat portable cord. 

This may help in remembering common applications for festoon cables; they are typically used in cranes, hoists, and other suspension applications.

What is the construction of festoon cable?

Festoon cable is made of finely stranded bare copper conductors at its very core. The size of this cable ranges from 4/0 AWG to 16 AWG, and features either PVC insulation and jacket or neoprene insulation and jacket. The PVC version of this cable comes in black or yellow, while the neoprene is only available in black.

The neoprene version is more flexible than PVC because its conductors can have a higher strand count, meaning it can be used in continuous flexing applications.

Even though these versions vary slightly, they’re still similar. They both have small bending radii, contributing to each cable’s flexibility, and these cables still have many of the same applications.