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Inventories (Tables)
6 Months Ended
Jun. 30, 2019
Inventory, Net [Abstract]  
Components of Inventory
 June 30, 2019December 31, 2018
Raw materials$486,164 $439,616 
Work in progress174,196 154,878 
Finished goods300,469 265,722 
Subtotal960,829 860,216 
Less reserves(111,563)(111,420)
Total$849,266 $748,796