| http://www.w3.org/ns/prov#value | - Except where noted otherwise, capitalized and non-capitalized forms of all terms fall within each meaning: [0015] As used herein, a ???protective head gear device??? is a mask or a mask in combination with a protective hood, a helmet, any other protective device adapted to be worn over a person's head, or any combination thereof. [0016] As used herein, ???mask??? is used generically and includes b
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