Four methods of sampling in road and bridge construction are introduced in this paper. They are sampling of known distances, known horizontal angles, known elevations and plane point position.
In this norm, it is regulated the methods of sampling, fabrication, and sorting for oil sand samples, rock sample collection and entity sectional samples in the exploratory well fields.
The methods of sampling estimation data and amalgamating yield estimation were introduced to estimate theory yield of zhongshuang 4 and Huaza 6 of Brassica napus L. in this paper .
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