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English Translations » 甲醇及净化技术 » Daily Question J from the Purification Technology Exchange E

Daily Question J from the Purification Technology Exchange Edition 20180810

2018-08-10View Original

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Selection: A gas mask must be worn when the hydrogen sulfide concentration in the air exceeds ( ) ppm. When the hydrogen sulfide concentration in the air exceeds ( ) ppm, fatal poisoning can occur rapidly. A、 10B、 20C、 50D、 1000
Reply #22018-08-10
When the hydrogen sulfide concentration in the air exceeds (A) ppm, a gas mask must be worn. When the hydrogen sulfide concentration in the air exceeds (D) ppm, sudden fatal poisoning can occur. A, 10 D, 1000
Reply #32018-08-10
A, 10 D, 1000
Reply #42018-08-10
B, 20； D、 1000
Reply #52018-08-10
B, 20； D、 1000
Reply #62018-08-10
C: 50, D: 1000

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Translated at 2026-07-21 05:45:41

Original: https://bbs.hcbbs.com/thread-2037517-1-1.html

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