“standard sand”的概念、定义、翻译、参考文献-科学参考

单词	standard sand
释义	standard sand [`stan·dǝrd `sand] ^MATERIALS A silica sand that is free of organic matter and is used in making test samples of concrete and cement.
随便看	density specific impulse density step tablet density transmitter density wave density-wave theory density wedge densofacies Densovirus dental dental arch dental calculi dental caries dental coupling dental epithelium dental follicle dental formula dental gold Dentaliidae dental index dental pad dental papilla dental plate dental pulp dental ridge dental sac

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