Aerobic respiration, a process that uses oxygen, and anaerobic respiration, a process that doesn't use oxygen, are two forms of cellular respiration.Although some cells may engage in just one type of respiration, most cells use both types, depending on an organism's needs.erobic respiration, a process that uses oxygen, and anaerobic respiration, a process that doesn't use oxygen, are two forms of cellular respiration.
exists and is an alternate of . conventional machining is that in which the control of removal of material is either by automatic machines or by man handled.while cnc machinig is that in which control of machining process is done by computes or through programming.
Baloncici/iStock/Getty Images. CNC machining is a fancy term for tools such as routers, grinders and milling machines that are guided by computer instead of by hand. Many CNC, or computer numerical control, machines still need humans to run them, however. These types of tools use CAD, or computer-aided design, to function.