选择非石雕功课工人60人作为对照组：运用噪声仪测定工作情况噪声以及粉尘采样器测定粉尘浓度状况。
Choose a stone homework workers 60 people as control group: use noise meter measuring work environment noise and dust sampler determination of dust concentration.
选择非石雕功课工人60人作为对照组：运用噪声仪测定工作情况噪声以及粉尘采样器测定粉尘浓度状况。
Choose a stone homework workers 60 people as control group: use noise meter measuring work environment noise and dust sampler determination of dust concentration.
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