Questions on 'inventions' category
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1
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699
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1
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506
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0
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0
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504
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0
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0
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528
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0
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0
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449
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0
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1
answer
743
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0
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0
answer
483
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0
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0
answer
497
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0
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0
answer
495
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0
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0
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512
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0
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0
answer
491
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0
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0
answer
502
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0
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0
answer
497
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0
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0
answer
527
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0
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0
answer
471
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0
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0
answer
506
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0
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0
answer
476
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0
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0
answer
477
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0
votes
0
answer
482
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0
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0
answer
546
views
0
votes
0
answer
492
views
0
votes
0
answer
503
views
0
votes
0
answer
530
views
0
votes
0
answer
477
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0
votes
0
answer
489
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0
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0
answer
572
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0
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0
answer
565
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0
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0
answer
570
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0
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0
answer
570
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0
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0
answer
563
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