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为研究生产环境中有害因素对有色金属产业工人牙齿的影响,用出生30d的大鼠160只进行模拟实验,用特制装置使大鼠吸入多种金属粉尘和SO_2,接近实际的生产环境,并在实
In order to study the impact of harmful factors in the production environment on the teeth of non-ferrous metal workers, 160 rats of 30 days old were used to carry out simulation experiments. Rats were inhaled with various metal dusts and SO 2 using a special device, close to the actual production environment. real