Australian coal is a high grade coal sort, boasting high volatile matter content, high calorific value, and low ash content.

澳大利亚煤(澳煤)是具有高挥发分、高热值、低灰分等特点的优质动力煤。

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The Ohio river has been called the American Ruhr, As in Germany, the area along the river is rich in valuable deposits of high-grade coking coal and is well known for its steel industry.

俄亥俄河被称作美国的鲁尔河，就像德国一样，沿河有丰富的高品质的炼焦煤，并且因其钢铁而著名。

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Generally speaking, the coal of power plant is low-grade, high-ash (the low content of fixed carbon) and the effect of direct gasification is bad.

一般说来，电站煤质的品位低、灰含量高(低的固定碳含量)，直接气化效果很差。

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High grade coal that is used to make steel is in particular demand in developing countries such as China, India and Brazil.

MSN: Coal producers find themselves in a hard place

Coking coal is high grade coal used in the production of steel.

BBC: Rio Tinto raises bid for Australia's Riversdale

Simply, all the intelligence out of Australia and Appalachia points to higher pricing, some 10 percent on high quality metallurgic grade coal next year.

FORBES: Magazine Article