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NOTE 5 - INVENTORIES - Inventories (Details) - USD ($) | Jun. 30, 2021 | Jun. 30, 2020
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Inventory Disclosure [Abstract] |  |
Purchased parts, components and supplies | $ 1,393,329 | $ 1,544,036
Work-in-process | 270,090 | 104,734
Inventories | $ 1,663,419 | $ 1,648,770

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