
Construction contract procedures VOB - Part C: General technical specifications in construction contracts (ATV); Insulation of service installations
出版:German Institute for Standardisation (Deutsches Institut für Normung)

专家解读视频
Construction contract procedures VOB - Part C: General technical specifications in construction contracts (ATV); Insulation of service installations
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频