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REVENUE RECOGNITION (Tables) | 12 Months Ended
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Dec. 31, 2021
REVENUE RECOGNITION |
Disaggregation of revenue by product line | The following table presents the Company’s Net sales disaggregated by product line: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | 2021 |  | 2020 |  | 2019
Consumables | ​ | $ | 1,856,880 | ​ | $ | 1,509,509 | ​ | $ | 1,715,002
Equipment | ​ |  | 1,377,300 | ​ |  | 1,145,891 | ​ |  | 1,288,270
Net sales | ​ | $ | 3,234,180 | ​ | $ | 2,655,400 | ​ | $ | 3,003,272

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