noble metal是什么意思

用法例句

Weighing requests and equip weighing instrument of the noble metal and the gem;

贵重金属及宝石的称量要求和配备衡器

Study of Thiacalixarene Separation/Preconcentration and Determination of Trace Noble Metal and Heavy Metal Ions with Flame Atomic Absorption Spectrometry;

硫杂杯芳烃分离富集—火焰原子吸收光谱法测定贵重金属离子的研究

Experimental investigation on reducing fine productivity of mining precious ores by blasting;

降低坚硬贵重矿石爆破法开采粉矿产出率的实验探讨