A Backup Battery Unit, or uninterruptible power supply (UPS), is primarily used to provide a backup power source to important desktop computer hardware components. In most cases, those pieces of hardware include the main computer housing and the monitor, but other devices can be plugged into a UPS for backup power, depending on the size of the UPS.
http://www.cell2power.com/backup-battery-unit/

Nowadays, PPR is the most commonly used material for pipes and fittings. PPR is a random copolymer polypropylene. In winter, the flexibility of PPR water pipes will decrease, while the rigidity will increase and flatten. If the pipe is impacted by an external force, the surface of the pipe will crack more seriously.
http://www.chinapepipe.com/ppr-pipe-and-fittings/

Slewing Bearings, or turntable bearings, are ball or roller style bearings composed of two concentric rings either of which may include a gear. This type of bearing enhances load support and power transmission in all directions, and is typically employed to support heavy loads for slow applications and large equipment such as earth excavators and construction cranes. The unique power and versatility of slewing ring bearings has made them increasingly valuable in a wide array of industries, including construction, industrial, robotics, machine tooling, and medical applications.
http://www.cnslewingring.com/slewing-bearing/

There are two primary varieties of fan, axial fans and centrifugal fans. Pelonis Technologies, Inc. (PTI), a global leader in fan technology for more than 25 years, manufactures both axial and centrifugal fans. The design and function of a centrifugal fan is very different from those of an axial fan. Their differences make them each suited for different applications and customers are sometimes unclear as to which fan type will best suit their needs.
http://www.dhlcentrifugalfan.com/axial-flow-fan/

A cartooning machine, sometimes called a cartoner for short, is a type of packaging machine. Its sole purpose is to form cartons. Have you ever seen a milk carton? If you look at the average milk carton in the grocery store, a cartooning machine probably made it. A cartooning machine forms cartons that stand up straight, close, are folded, side-seamed, and then, ultimately, sealed.
http://www.kdpackmachine.com/cartoning-machine/