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致害经过:4名工人于某日上午9时一起进入地沟内修理暖气闸门。该地沟为砖土结构、水泥盖,有0.5×0.7m进出口,地沟深9m,盖严密。4名工人刚一进入地沟即感气短、恶心、头晕、心悸。但仍坚持工作,约5分钟后其中一名最年轻的工人突感坚持不住,即顺梯爬上昏倒在地。随后,过路人亦将另三名扶到地面。4名工人口唇发组、额头冷汗、恶心、视物旋转,其中2名口吐白沫、呼吸急
After the killing: four workers at 9:00 on the certain day into the trench to repair the heating gate. The trench for the brick structure, cement cover, 0.5 × 0.7m import and export, ditch deep 9m, cover tight. As soon as the four workers entered the trench, they felt short of breath, nausea, dizziness and heart palpitations. However, he still persisted in his work. After about 5 minutes, one of the youngest workers did not persist in feeling that the stairwell had climbed up and collapsed to the ground. Subsequently, passers-by also helped the other three to the ground. 4 workers lip group, forehead sweat, nausea, depending on the material rotation, of which 2 foaming at the mouth, shortness of breath