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Working in underground construction involves unique risks, making safety measures critical to protect workers and ensure smooth operations. One of the primary precautions is proper ventilation to prevent the accumulation of toxic gases such as carbon monoxide, methane, or hydrogen sulfide. Adequate airflow reduces the risk of suffocation and explosive atmospheres. Continuous monitoring of air quality with gas detectors is essential to alert ______ __________ ____ _________ ____ _______ _________ ____ ____ __________ __________.
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