"Factory" means any premises including the precincts
thereof-
(i) wherein ten or more workers are working, or were working on any day of preceding twelve months, and in any part of which a manufacturing process is being carried on with the aid of power, or is ordinarily so carried on, or
(ii) whereon twenty or more workers are working, or were working on any day of the preceding twelve months, and in any part of which a manufacturing process is being carried on without the aid of power, or is ordinarily so carried on,- but does not include a mine subject to the operation of
3*[the Mines Act, 1952 (35 of 1952),] or 4*[a mobile unit belonging to the armed forces of the Union, a railway running shed or a hotel, restaurant or eating place].