A HUMAN NECESSITIES
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A42 HEADWEAR
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A42B HATS; HEAD COVERINGS
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A42B3/00 Helmets; Helmet covers; ; Other protective head coverings;
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A42B3/04 Parts, details or accessories of helmets
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A42B3/06 Impact-absorbing shells, e.g. of crash helmets
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A42B3/062 with reinforcing means
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