stone-like coal的用法和樣例：
例句
- The principles and low pollution process in production of vanadium pentoxide with stone coal containing vanadium are introduced in detail.
介紹用含釩石煤生產(chǎn)五氧化二釩的原理和低污染生產(chǎn)工藝。 - From the coal rank and the combustion characteristics and kinetic analyzing results, the stone coal should be classed as a high rank and maggy anthracite coal.
根據煤階和燃燒特性及動(dòng)力學(xué)分析判斷，石煤屬于高變質(zhì)的劣質(zhì)無(wú)煙煤。
