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北方地区气温很低,有的年平均气温为-7.8℃,在极寒冷地区更低(-68℃,-71℃)。在这些地区从事矿山机器(推土机、钻孔机、掘土机及露天采矿运输机)操纵的工人,受振动、寒冷、大量粉尘及有害气体的职业危害,因此发生振动病的危险性最大。作者调查北方某金刚砂采掘工业中接触振动的359名工人(57名纯北方工龄,302名混合工龄,有的在中部地区长期工作达10年以上)。发现血管紧张度异常(早期雷诺氏
Northern temperatures are very low, with an average annual temperature of -7.8 ° C and lower in extremely cold (-68 ° C, -71 ° C). Workers operating in mining machines (bulldozers, drilling machines, earthmoving machines and surface mining conveyors) in these areas are at greatest risk from vibration hazards due to occupational hazards from vibrations, cold, large amounts of dust and harmful gases. The authors investigated 359 workers exposed to vibrations in a diamond mining industry in North China (57 purely Northern service years, 302 mixed service years and some for long-term work in the central region for more than 10 years). Abnormal vascular tone was found (early Raynaud’s