File:Symbol sourcebook 1972 Mandatory Type 1, Hard Hat.svg
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![File:Symbol sourcebook 1972 Mandatory Type 1, Hard Hat.svg](https://upload.wikimedia.org/wikipedia/commons/thumb/3/34/Symbol_sourcebook_1972_Mandatory_Type_1%2C_Hard_Hat.svg/600px-Symbol_sourcebook_1972_Mandatory_Type_1%2C_Hard_Hat.svg.png?20240105050354)
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Original file (SVG file, nominally 700 × 700 pixels, file size: 5 KB)