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Sawmills are installations or facility in which cut logs are sawed into standard-sized boards and timbers. The saws used at sawmills are usually of three types: the circular saw, which consists of a disk with teeth around its edge; the band saw, which consists of a hoop of flexible metal that runs over pulleys and has teeth along one edge; and the log gang saw, which consists of saw blades separated by desired distances in a frame that oscillates as a log is fed into it. Logs are fed to gang saws through pressure rollers that ensure straight cutting. With other sawmills the log rides on a conveyor or carriage.
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