bump cap
Having or furnished with two legs, or leg-like appendages.
plural of neckwear
(UK) A hard hat. / (US) A form of baseball cap.
plural of buckminsterfullerene
メンテナンス作業場に入るときは、低く垂れ下がった配管から頭部を守るために安全ヘルメットを着用してください。
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