Smelting

例句:

• Once smelting was known to men, there is no great marvel in the finding of iron. 赫伯特·乔治·威尔斯. 世界史纲.
• It is a clay fire-hardened furnace for smelting iron. 威廉·亨利·杜利特. 世纪发明.
• The early smelting furnaces of Germany resembled the Catalan, and were called the Stückofen, and in Sweden were known as the Osmund. 威廉·亨利·杜利特. 世纪发明.
• The gigantic expansion of the iron and steel industry was foreshadowed in the change from wood to coal in the smelting furnaces. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• There is an opening in front about a foot or more in height which is filled with clay at the commencement, and broken down at the end of each smelting operation. 威廉·亨利·杜利特. 世纪发明.
• Between that time and 1770 he practised melting small pieces of blistered steel (iron bars which had been carbonised by smelting in charcoal) in closed clay crucibles. 威廉·亨利·杜利特. 世纪发明.
• The smelting of ore by charcoal in those places where carried on extensively required the use of a vast amount of wood, and denuded the surrounding lands of forests. 威廉·亨利·杜利特. 世纪发明.
• This application of steam to smoke and smelting has been frequently revived by modern inventors with much flourish of originality. 威廉·亨利·杜利特. 世纪发明.
• The method of smelting revealed by these finds carries out Lord Avebury's suggestion. 赫伯特·乔治·威尔斯. 世界史纲.
• These coal mines were being worked to supply coke for iron smelting, for which wood-charcoal had previously been employed. 赫伯特·乔治·威尔斯. 世界史纲.
• This smelting was then followed by hammering to further separate the slag, and probably after a reheating to increase the malleability. 威廉·亨利·杜利特. 世纪发明.

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