
Specification for ancillary components for masonry Part 2: Lintels (includes Amendment A1:2016)
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Specification for ancillary components for masonry Part 2: Lintels (includes Amendment A1:2016)
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻