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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク coal dust ： ウィキペディア英語版 coal dust Coal dust is a fine powdered form of coal, which is created by the crushing, grinding, or pulverizing of coal. Because of the brittle nature of coal, coal dust can be created during mining, transportation, or by mechanically handling coal. ==Risks== The Occupational Safety and Health Administration (OSHA) has set the legal limit (Permissible_exposure_limit) for coal dust exposure in the workplace as 2.4 mg/m3 (5% SiO2) over an 8-hour workday. The National_Institute_for_Occupational_Safety_and_Health (NIOSH) has set a Recommended_exposure_limit (REL) of 1 mg/m3 (measured by MSHA) or 0.9 mg/m3 (measured by ISO/CEN/ACGIH) over an 8-hour workday. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「coal dust」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.