“penetration number”的概念、定义、翻译、参考文献-科学参考

单词	penetration number
释义	penetration number [´pen·ǝ`trā·shǝn ´nǝm·bǝr] ^ENGINEERING The consistency of greases, waxes, petrolatum, and asphalt or other bituminous materials expressed as the distance that a standard needle penetrates the sample under specified American Society for Testing and Materials test conditions.
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