Choking or suffocating gas, typically carbon dioxide, that is found in mines and other underground spaces.
（矿井等地下）呛人（或令人窒息）的气体（多为二氧化碳）
Example sentencesExamples
But after a few days of rest and recovery he was lowered again, with some precautions against choke-damp, to chip down another ten feet, when water was struck.
Many a companion of mine have I seen dead with choke-damp, but none that I ever saw or heard of was so near to death in it as you were and escaped without help.
Advice was also given not to step down in any deep hole which might be seen without holding the candle forward, in which case if there was choke-damp it would go out, which would be fair warning.