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Inventories (Tables)
9 Months Ended
Jul. 31, 2020
Inventory Disclosure [Abstract]  
Inventories

Inventories consisted of the following:

    July 31, 2020   October 31, 2019
Raw materials   $ 2,435,1778     $ 2,035,612  
Work in process     1,558,861       1,239,861  
Finished goods     340,584       843,584  
    $ 4,334,623     $ 4,119,057