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semi-conductor substrates manufacturing machines; parts and fittings for semi-conductor substrates manufacturing machines; machines for manufacturing semi-conductors; parts and fittings for machines for manufacturing semi-conductors; electronic component feeders for electronic circuit board manufacturing machines; parts and fittings for electronic component feeders for electronic circuit board manufacturing machines; heat treatment apparatus for manufacturing semi-conductors; parts and fittings for heat treatment apparatus for manufacturing semi-conductors; electronic component manufacturing machines; parts and fittings for electronic component manufacturing machines; mounting machines and equipment of components for manufacturing semi-conductors; parts and fittings for mounting machines and equipment of components for manufacturing semi-conductors; machines and equipment which automatically mount electronic parts such as IC chips on printed circuit boards; parts and fittings for machines and equipment which automatically mount electronic parts such as IC chips on printed circuit boards; memory chip manufacturing machines; parts and fittings for memory chip manufacturing machines; laminated semi-conductor chip manufacturing equipment; parts and fittings for laminated semi-conductor chip manufacturing equipment; machines and equipment which mount IC chips on circuit boards; parts and fittings for machines and equipment which mount IC chips on circuit boards; stamps and plates used for manufacturing process of electronic components and micro computer chips