minerals and rocks ,almond stone structure of melaphyre (ilfeld, thuringia, germany) - 硫磺 幅插畫檔、美工圖案、卡通及圖標
a cement kiln is a large, rotating cylindrical furnace used in the production of cement - 硫磺 幅插畫檔、美工圖案、卡通及圖標
melting iron in a crucible involves heating the iron within a heat-resistant container, often made of clay graphite or silicon carbide - 硫磺 幅插畫檔、美工圖案、卡通及圖標
reverberatory furnace, specifically a puddling furnace, that utilizes gas as its fuel source to produce wrought iron - 硫磺 幅插畫檔、美工圖案、卡通及圖標
the bessemer process was the first inexpensive industrial process for the mass production of steel from molten pig iron before the development of the open hearth furnace - 硫磺 幅插畫檔、美工圖案、卡通及圖標
in england, blast furnaces transitioned from using charcoal to coke as a fuel source in the early 18th century - 硫磺 幅插畫檔、美工圖案、卡通及圖標
the siemens regenerative furnace, developed in the 1850s, is a type of open-hearth furnace that utilizes regenerative preheating to achieve high temperatures for steelmaking - 硫磺 幅插畫檔、美工圖案、卡通及圖標
the bessemer process was a revolutionary method of mass-producing steel developed by sir henry bessemer in the 1850s - 硫磺 幅插畫檔、美工圖案、卡通及圖標發明, 復古風格
minerals and rocks ,grown crystals (veining grading) of galena and siderite (heudorf, lower saxony, germany) - 硫磺 幅插畫檔、美工圖案、卡通及圖標紅寶石, 鑽石, 圖畫 - 藝術品
minerals and rocks , stibnite antimonite (arnsberg, north rhine-westphalia, germany) - 硫磺 幅插畫檔、美工圖案、卡通及圖標礦物質
minerals and rocks ,sulfur, trapped in plaster (weenzen, niedersachsen, germany) - 硫磺 幅插畫檔、美工圖案、卡通及圖標圖畫 - 藝術品, 岩石, 花崗岩
