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The various complicated machine ___ now used by engineers are designed to do the same ___ as the hammer, the chisel and the file, but very much more quickly and ___, and with much wider range of application. The vastly increased production of modern times would never have been possible without these to take the place of handwork, nor could the hand-worker ever produce the precision now needed.
The machine-tools which have replaced the ___ and file and which shape the metal by removing ___ of it are shapers, planers, milling machines, ___ and boring machines, grinders and lathes and those which have replaced the ___ and which press the metal into the required ___ are steam hammers, forging and pressing machines and sheet___ work tools.

svetlanaka123    3   03.06.2020 16:47    51