通过典型抽样调查，查明甘肃林区主要建群树种橡树的籽壳碗叶的产量；
Through the typical sample survey, I have ascertained the output of bow leaf of oak tree seed.
方法遵照全国医疗照射调查的统一方案，采用分层抽样调查、普查和典型调查相结合。
Methods Complying with the united plan of medical survey nationwide, we combined sampling survey in various layers with general survey and typical survey.
以典型三阶抽样和一阶抽样方法，建立调查样本，对中山市乡镇和自然村四旁绿化进行抽样调查。
Survey samples are set up by using typical methods of 3-rank and 1-rank sampling to survey the turning the "four sides" green of townships and villages in Zhongshan City.
以典型三阶抽样和一阶抽样方法，建立调查样本，对中山市乡镇和自然村四旁绿化进行抽样调查。
Survey samples are set up by using typical methods of 3-rank and 1-rank sampling to survey the turning the "four sides" green of townships and villages in Zhongshan City.
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