
Subsoil; Exploration By Diggings (trial Pits) And Boring As Well As Sampling, Indications In Rock
出版:German Institute for Standardisation (Deutsches Institut für Normung)

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Subsoil; Exploration By Diggings (trial Pits) And Boring As Well As Sampling, Indications In Rock
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频