Laser cutting, CNC milling, and Knitting machines. Dispersion techniques include grinding solids to colloidal dimensions by ball milling and Bredig's arc method. Many castings are machined in CNC milling centers. Traditional techniques for micronization focus on mechanical means, such as milling and grinding. Mill orientation is the primary classification for milling machines. Mill drills are a lighter alternative to a milling machine. A CNC router is very similar in concept to a CNC milling machine. The tooling used for thread milling can be solid or indexable. The machinery differs if the windmill is used for other applications than milling grain. Milling and drilling tools are often multipoint tools. The milling and polishing processes both remove nutrients. Industries include oilseed pressing, flour milling, and glass manufacture. Bread making began with the milling of the grain. He went on to work as a milling machine operator. They may also be ridden, or used for threshing, raising water, milling and other work.