NF P94-061-1-中文
土壤:勘测与试验 - 现场材料的密度测定 - 第一部分:针式伽马密度计法(直接传递)
Soil - Investigation and testing - Determination of the density of in-situ materials - Part 1: Needle gamma-ray density gauge method (direct transmission)
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Soil - Investigation and testing - Determination of the density of in-situ materials - Part 1: Needle gamma-ray density gauge method (direct transmission)