
En 845 Specification For Ancillary Components For Masonry - Part 1: Ties, Straps, Hangers, Brackets And Support Angles
出版:British Standards Institution

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En 845 Specification For Ancillary Components For Masonry - Part 1: Ties, Straps, Hangers, Brackets And Support Angles
出版:British Standards Institution
專家解讀視頻