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INVENTORIES (Tables)
3 Months Ended
Mar. 31, 2022
INVENTORIES  
Schedule of components of inventories

March 31, 

December 31, 

    

2022

    

2021

Parts and raw materials

$

273,435

$

261,365

Work in process

 

29,393

 

24,222

Finished goods

 

57,973

 

52,823

Total

$

360,801

$

338,410