standard mass

• 标准质量

standard mass的用法和样例：

例句

1. A unit of fineness for rayon, nylon, and silk fibers, based on a standard mass per length of 1 gram per 9,000 meters of yarn.
   丹尼尔测量纤维、尼龙或丝的光洁度的单位，每9,000米线重1克称作为丹尼尔。