
Contract Procedure For Building Works; Part C; General Technical Specifications For Building Works; Damp Proofing Against Non Pressurised Water
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Contract Procedure For Building Works; Part C; General Technical Specifications For Building Works; Damp Proofing Against Non Pressurised Water
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻