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2. INVENTORIES (Details) - USD ($)
Dec. 31, 2020
Jun. 30, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 614,114 $ 653,678
Work-in-progress 509,307 665,593
Finished goods 821,645 877,973
Total inventories $ 1,945,066 $ 2,197,244