Fusion Splicing. Fusion splicing is the process of fusing or welding two fibers together usually by an electric arc. Fusion splicing is the most widely used method of splicing as it provides for the lowest loss and least reflectance, as well as providing the strongest and most reliable joint between two fibers. Virtually all singlemode splices are fusion.
Disc Brakes. A disc brake system consists of a brake disc, a brake calliper and brake pads. When the brake pedal is applied, pressurised hydraulic fluid squeezes the brake pad friction material against the surface of the rotating brake disc. The result of this contact produces friction which enables the vehicle to slow down or stop.
A disc brake on a modern tractor with the disc visible in the middle of the wheel centre (white ring) and the Brake calliper at the middle left of the photo (silver block) - the axle is to the right. Disc brakes are a type of Brake were the brake pads grip the side of a metal disc to slow rotation down. These are replacing the earlier drum brake and Brake bands on tractors today as they perform far better.