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Class E (Electrical) provides dielectric protection up to 20,000 volts. Class G (General) provides dielectric protection up to 2,200 volts. Class C (Conductive) provides no dielectric protection. A hard hat is specified by both Type and Class; for example: Type I Class G. ANSI standards for hard hats set combustibility or flammability criteria ...
Standard diving dress, also known as hard-hat or copper hat equipment, deep sea diving suit or heavy gear, is a type of diving suit that was formerly used for all relatively deep underwater work that required more than breath-hold duration, which included marine salvage, civil engineering, pearl shell diving and other commercial diving work, and similar naval diving applications.
Bowler hat: A hard felt hat with a rounded crown created in 1850 by Lock's of St James's, the hatters to Thomas Coke, 2nd Earl of Leicester, for his servants. More commonly known as a Derby in the United States. [19] Breton: A woman's hat with round crown and deep brim turned upwards all the way round.
Bowler, also coke hat, billycock, boxer, bun hat, derby; Busby; Bycocket – a hat with a wide brim that is turned up in the back and pointed in the front; Cabbage-tree hat – a hat woven from leaves of the cabbage tree; Capotain (and women) – a tall conical hat, 17th century, usually black – also, copotain, copatain; Caubeen – Irish hat
Hat sizes are determined by measuring the circumference of a person's head about 1 centimetre (2 ⁄ 5 in) above the ears. Inches or centimeters may be used depending on the manufacturer. Felt hats can be stretched for a custom fit. Some hats, like hard hats and baseball caps, are adjustable.
The article stated that, at that time, bearskin hats cost £7–5s each (about 35 contemporary US dollars; [43] £600 in 2007 pounds) [44] and noted "it can readily be seen what a price has to be paid for keeping up a custom which is rather old, it is true, but is practically a useless one save for the purpose of military display."
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