The researchers are analyzing the chemical makeup of earlier and later coal deposits for measures of ancient carbon dioxide, temperature, rainfall and other variables.
Other specialized chemical washes may be used in the remedial treatment of scales or paraffin deposits in production tubulars.
其它的特殊的化学冲洗剂可用于对生产管中的水垢或石蜡沉积进行补救性处理。
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Based on the analysis and research of AGB granite rock texture, mineral composition, chemical components, we explore the evolution of granitoids and tantalum lithium deposits relationship.