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Defender Safety H2 Safety Helmet Hard Hat, Type 2 Class C and E, ANSI Z89.1 and EN 12492 Rated (Class E, Battleship Gray) : Amazon.ca: Tools & Home Improvement
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Defender Safety H2 Safety Helmet Hard Hat, Type 2 Class C and E, ANSI Z89.1 and EN 12492 Rated (Class E, Battleship Gray) : Amazon.ca: Tools & Home Improvement
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Climbing style safety helmets do not improve impact protection over type II hard hats - ScienceDirect
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