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Inventories
12 Months Ended
Dec. 31, 2020
INVENTORIES [Abstract]  
Inventory Disclosure INVENTORIES
Inventories consisted of the following at December 31:
20202019
Raw materials and parts$132,041 $129,294 
Work-in-progress55,688 43,202 
Finished goods109,882 101,789 
Total inventory$297,611 $274,285