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INVENTORIES (Details) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
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Inventory Disclosure [Abstract] |  |
Raw materials, parts and supplies | $ 1,188,616 | $ 1,522,082
Work-in-progress | 1,923,426 | 534,937
Finished products | 261,809 | 424,492
Total inventories | $ 3,373,851 | $ 2,481,511

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