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| 0000080172-18-000049-index.html | 2018-12-14 16:00:39 | |
| 0000080172-18-000049.txt | 2018-12-14 16:00:39 | |
| npk-20181211x8k.htm | 40879 | 2018-12-14 16:00:39 |
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