
Construction contract procedures (VOB) C: General technical specifications in construction contracts (ATV); Structural steelwork
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Construction contract procedures (VOB) C: General technical specifications in construction contracts (ATV); Structural steelwork
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻