Hydrogen sulfide leaks, methane explosions, mine-stope collapses, oh my! Coal mining is an ancient profession, and has been recognized as wildly risky since the very start.
硫化氢泄露、甲烷爆炸、煤矿坍塌，天呢，太危险了！煤矿开采是一种古老的职业，有史以来，就一直被认为是风险极高的职业。
Uses: used in coal, mine, water treatment etc. profession.
用途：用于煤炭、矿山、污水处理等行业。
Uses: used in coal, mine, water treatment etc. profession.
用途：用于煤炭、矿山、污水处理等行业。
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