1881资源列表
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[国外标准] BS 1881∶Part116∶1983 Testing concrete. Method for determination of compressive strength of concrete
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[国外标准] BS 1881∶Part114∶1983 Testing concrete. Methods for determination of density of hardened concrete
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[国外标准] BS 1881∶Part111∶1983 Testing concrete. Method of normal curing of test specimens (20°C method)
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[国外标准] BS 1881∶Part107∶1983 Testing concrete. Method for determination of density of compacted fresh concre