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standard penrtration test
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standard penrtration test
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岩土工程原位测试
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standard penrtration test
标准贯入试验
用63.5千克穿心锤,以76厘米的自由落距,将标准规格的贯入器在钻孔底预打15厘米,测记再打入土中30厘米的锤击数(N)的原位测试技术。
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The National 12th Five-year Strategic Plan for Public Library Development
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the National Association of Social Workers Code of Ethics
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