Ores

例句:

• Valuable metallic ores, such as those of gold, platinum, tin, copper and iron, often occur in the form of sand or mixed with that substance. 佚名. 神奇的知识之书.
• This process is best adapted to what are known as free milling or porous ores, where the gold is free and very fine and is attracted readily by mercury. 威廉·亨利·杜利特. 世纪发明.
• In the treatment of iron ores, and especially those of low grade, the magnetic concentrator is an interesting and striking departure. Edward W. Byrn. 十九世纪发明进展.
• Some chemical and other processes for reducing ores have been referred to in the Chapter on Metallurgy. 威廉·亨利·杜利特. 世纪发明.
• For many years it had been a much-discussed question how to make these ores available for transportation to distant furnaces. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• Many attempts had been made in by-gone days to concentrate the iron in such ores by water processes, but with only a partial degree of success. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• By the cyanide process, in which cyanide of potassium is used as a solvent for the gold, low-grade ores can be profitably worked. 佚名. 神奇的知识之书.
• Granite is not rich in mineral ores. 佚名. 神奇的知识之书.
• Cur ie examined at the same time the salts of uranium and a number of uranium ores. 李贝. 西洋科学史.
• The try everything spirit of Edison's method is well illustrated in this early period by a series of about sixteen hundred resistance tests of various ores, minerals, earths, etc. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• The chief of machines with _ores_ is the _ore mill_, which not only breaks up the ore but grinds or pulverises it. 威廉·亨利·杜利特. 世纪发明.
• This crusher consists of two ponderous upright jaws, one fixed and the other movable, between which the stones or ores to be crushed are fed. 威廉·亨利·杜利特. 世纪发明.
• Iron, which seems to have been first reduced from its ores by the Hittites, was, to begin with, a rare and much-desired substance. 赫伯特·乔治·威尔斯. 世界史纲.
• Seventeen different methods and devices for separating magnetic ores. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• As to gold, silver and lead, they doubtless were found first in their native state and mixed with other ores and were hammered into the desired shapes with the hardest stone implements. 威廉·亨利·杜利特. 世纪发明.
• To pay railroad charges on ores carrying perhaps 80 to 90 per cent. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.

录入:文斯