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This post was last edited by wgqmqez on 2016-4-22 at 11:19. To increase the popularity of the purified version area, a \"One Question per Day\" activity has been launched to foster active technical exchanges while also providing certain financial rewards to users. (Fellow sailors, if you have any good questions, feel free to send them to me; let’s work together.) 【Daily Question】 (Fill-in-the-blank) The permissible industrial hygiene concentration for carbon monoxide is ( ) PPM, and protection is provided by filters of ( ) color. Post your answer as a reply; participating in the quiz earns you +2 wealth points. If you answer all questions correctly, you’ll receive an additional +3 to +8 wealth points. Those who provide thorough analysis and explanations for the questions or their answers, including detailed calculation processes, will receive extra wealth rewards. If your answer is correct and your analysis and explanation are accurate, it will be marked as the best reply (or the best assistance). Feel free to answer the questions.
The permissible industrial hygiene concentration for carbon monoxide is (30) ppm; protection is provided by a (white) gas filter canister
The permissible industrial hygiene concentration for carbon monoxide is (up to 30) PPM, and protection is provided by (white) gas filters.
30mg/m3 (30ppm), use white (5#)
The permissible industrial hygiene concentration for carbon monoxide is (30) PPM, and protection is provided by (white) gas cartridges.
The permissible industrial hygiene concentration for carbon monoxide is (≤30 mg/m3 or 30 ppm), and protection is provided by a filter canister of type (white 5#).