Break-in

[mechanical run-in] Break-in or breaking in, also known as run-in or running in, is the procedure of conditioning a new piece of equipment by giving it an initial period of running, usually under light load, but sometimes under heavy load or normal load. It is generally a process of moving parts wearing against each other to produce the las...
Found on http://en.wikipedia.org/wiki/Break-in_(mechanical_run-in)
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