view dependent layer sampling 视点相关层次采样
two-layer sampling 双层采样
layer sampling after the event 事后分层抽样
Sub-sampling layer 下采样层
Pneumatic sampling for 1 layer 气动抽样为1层
Investigation of pollution situation of bottom layer of a landfill by boring sampling was carried out.
通过钻探取样对一个垃圾场底部土层的污染状况进行了现场调查。
Sampling examination by metallographic test was the traditional method for measuring the depth of the quenched layer in crankshaft, which could not meet the needs of the production of auto industry.
传统的曲轴淬火层深度测试方法是金相抽检，不能满足汽车工业生产需要。
So, all above mentioned makes it necessary to study the truth-preserving sampling technique for the deep-sea surface layer sediments.
这些问题的提出就使得深海海底表层沉积物的保真取样技术研究非常有必要。
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