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Inventory (Details) - USD ($)
Sep. 30, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Finished goods $ 97,847 $ 94,727
Work-in-process 21,357 20,676
Raw materials 59,811 57,904
Allowance for inventory valuation and obsolescence loss (179,015) (173,307)
Inventory, net