~::main part 1-electric motor::~[RM25KGRS Quatro-refrigerator SAMSUNG]

SAMSUNG’s innovative quantro Cooling System has 4 compartments and its components are have their own evaporator and fan. The fan and a heavy metal device, compressor are generated by electric motor which is the main part in the refrigerator. The compressor is near the bottom of the refrigerator unit. More heat-exchanging pipes are coiled behind the refrigerator. Running through the entire system is pure ammonia, which evaporates at -27 degrees. Modern refrigerators don't use CFC because CFCs are harmful to the atmosphere if released. Instead they use another type of gas called HFC-134a, also called tetrafluoroethane. The liquid flows through what's called an expansion valve, a tiny small hole that the liquid has to squeeze through. Between the valve and the compressor, there is a low-pressure area because the compressor is pulling the ammonia gas out of that side.The Quantro Cooling have features both the Arctic and Fresh Select Zone.

~::summarizing how the gadget function::~

This gadget can handle recorded television programs, movies, home videos, music and digital photos. We can store and access all of our digital entertainment files on a single, lightweight like paperback novel. Firstly, it have hard disk. It is the main part in the portable media centers. It can store changing digital information in a permanent form. Data is stored onto the disk in the form of files. The file that have in the hard disk can be take and display on the screen. We can press the button to choose any option that have in the gadget. Like the PMP-140, the PMC's screen takes centre stage. At 3.5in, it's big enough to watch the odd television . On either side of the screen are the player's controls. iRiver has decided to have a different look at feel for the PMC-120 over its Linux-based machine. The portable media gadget have main part which is 20GB or 40GB hard disk that can hold up to 160 hours of video, up to 10,000 songs or tens of thousands of digital photographs. It can support a wide variety of different file types, such as Microsoft Windows Media Audio files, JPEG image files, MPEG movie files, Microsoft Windows Video files.