“elliptic-type weight for hydrometry”的概念、定义、翻译、参考文献-科学参考

单词	elliptic-type weight for hydrometry
释义	elliptic-type weight for hydrometry Encyclopedia 工学水文测验铅鱼释 elliptic-type weight for hydrometry水文测验铅鱼用于在江河水体中稳定水下测量仪器、减少偏角的铅制水文器具，因其外形与鱼形相似而得名。
随便看	second class of ordinal numbers second comparison test second complementary law second component second conjugate space second contact second control second cosine formula second cosine theorem second cosmic velocity second countability axiom second countable space second countable topological space second Cousin problem Second creation second critical magnetic field second cultivated machinery second curvature second demographic transition second derivative second derivative test second derivative test discriminant second development second difference second differential

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