... 标准电极电势 standard electrode potential 标准度量衡 standard weights and measures 标准砝码 standard weight ...
基于46个网页-相关网页
·2,447,543篇论文数据，部分数据来源于NoteExpress
The international prototype kilogram, the primary standard (see weights and measures) for weight, is made of an alloy comprising 90% platinum and 10% iridium.
国际标准质量千克的原型就是由90%铂和10%铱的合金制成的。
youdao
应用推荐
模块上移
模块下移
不移动