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Inventories (Tables)
9 Months Ended
Sep. 30, 2019
Inventories [Abstract]  
Inventories Inventories consist of the following:


 
September 30,
2019
   
December 31,
2018
 
Raw materials and parts
 
$
171,552
   
$
173,919
 
Work-in-process
   
78,110
     
69,718
 
Finished goods
   
81,317
     
89,152
 
Used equipment
   
25,910
     
23,155
 
Total
 
$
356,889
   
$
355,944