Choose a stone homework workers 60 people as control group: use noise meter measuring work environment noise and dustsampler 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。
2
Objective To prepare a new multi functional sampler, which can better reflect the level of dust and chemical substance inhaled by exposed human bodies.
目的研制一种多用途，更能反映人体实际接触或吸入尘毒水平的采样仪。
3
The sand sampler is one of the important tools that studies wind erosion, it can observe the sand dust with the variety of the height, can collect the sand dust quantity of the dissimilarity height.