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INVENTORIES (Tables)
3 Months Ended
Mar. 31, 2020
INVENTORIES  
Schedule of inventories, by component

March 31,

December 31,

2020

2019

 

Raw materials

$

106,787

$

111,653

Work in process

 

120,151

 

123,750

Finished goods

 

144,921

 

140,392

Total

$

371,859

$

375,795