“standard penrtration test”的概念、定义、翻译、参考文献-科学参考

单词	standard penrtration test
释义	standard penrtration test Encyclopedia 工学岩土工程原位测试释 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。
随便看	ionospheric disturbance ionospheric disturbances ionospheric dynamo ionospheric dynamo effect ionospheric eclipse ionospheric effect ionospheric HF oblique sounding ionospheric instability ionospheric irregularities ionospheric irregularity ionospheric modification ionospheric parameters ionospheric propagation of ultrashort wave ionospheric radio wave propagation ionospheric refraction ionospheric refraction and radio wave propagation delay ionospheric refraction correction ionospheric region ionospheric satellite ionospheric scintillation ionospheric sounding ionospheric storm ionospheric structure ionospheric topside sounding ionospheric vertical sounding

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