
BS EN 772-18. Methods of test for masonry units. Part 18. Determination of freeze-thaw resistance of calcium silicate masonry units
出版:British Standards Institution

專家解讀視頻
BS EN 772-18. Methods of test for masonry units. Part 18. Determination of freeze-thaw resistance of calcium silicate masonry units
出版:British Standards Institution
專家解讀視頻