When the figure is not level people cannot know what is meant by width, depth, or height without being told (or without labels), although length is generally still assumed to mean the direction in which the figure is longest..
Crude coal tar is a raw material which is further distilled to produce various carbon products, refined tars and oils used as essential components in the production of aluminum, rubber, concrete, plasticizers, coatings and specialty chemicals.oke is uses as a fuel and as a reducing agent in smelting iron ore in a blast furnace to manufacture steel and in foundry operations. Crude coal tar consists of a mixture of naturally occurring compounds containing hydrogen and carbon that are common to all organic fuels including coal, petroleum and wood.
tar. see tar and pitch tar and pitch,viscous, dark-brown to black substances obtained by the destructive distillation of coal, wood, petroleum, peat, and certain other organic materials.The heating or partial burning of wood to make charcoal yields tar as a byproduct and is an ancient method for the.....he low-temperature (500Â°-600Â°C) dry distillation of coal or peatâthat is, semicokingâyields so-called primary tar. The coking of coal yields coal tar. The tar formed by heat treating wood is called wood tar.