Chromium

(noun.) a hard brittle multivalent metallic element; resistant to corrosion and tarnishing.

手打:梅格

• The ruby owes its fine red color to the presence of oxide of chromium; the sapphire its deep blue to either a lower oxide of chromium or to an oxide of titanium. 佚名. 神奇的知识之书.
• Thus we have nickel, chromium, and tungsten steel. 威廉·亨利·杜利特. 世纪发明.
• The ruby, chemically considered, is crystallized alumina, or oxide of aluminum, with a small percentage of oxide of chromium. 佚名. 神奇的知识之书.
• He now turned to the use of almost infusible metals--such as boron, ruthenium, chromium, etc. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• The new processes depend chiefly on the use of chromium compounds. 威廉·亨利·杜利特. 世纪发明.
• A great variety of methods for coating incandescent lamp filaments with silicon, titanium, chromium, osmium, boron, etc. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.

巴纳德编辑