
German construction contract procedures (VOB) Part C: General technical specifications in construction contracts (ATV) - Roofing work
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
German construction contract procedures (VOB) Part C: General technical specifications in construction contracts (ATV) - Roofing work
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻