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INVENTORIES (Tables)
12 Months Ended
Dec. 26, 2020
Inventory Disclosure [Abstract]  
Schedule of Components of Inventories Inventories consisted of the following at December 26, 2020 and December 28, 2019:
20202019
Raw materials and purchased parts
$155,512 $158,314 
Work-in-process
33,632 38,088 
Finished goods and manufactured goods
259,797 221,968 
$448,941 $418,370