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2. INVENTORIES (Details) - USD ($)
Sep. 30, 2020
Jun. 30, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 628,052 $ 653,678
Work-in-progress 699,129 665,593
Finished goods 811,209 877,973
Total inventories $ 2,138,390 $ 2,197,244