求翻译：本文通过介绍了国内外燃煤工业烟气脱硫技术的概况，将烟气脱硫技术主要分为燃烧前脱硫、燃烧中脱硫和燃烧后脱硫。是什么意思？

This paper describes the domestic coal-fired flue gas desulphurization technology industry overview, the flue gas desulphurization technology is divided into pre-combustion desulfurization, desulfurization, and combustion in the combustion desulfurization.

This article describes both at home and abroad through coal-fired industrial flue gas desulphurization technology, will provide an overview of the flue gas desulphurization technology mainly pre-combustion flue gas desulphurization, burning sulfur recovery and post-combustion flue gas desulphurizati

This article through introduced the domestic and foreign coal-burning industry haze desulphurization technology survey, after mainly divides into the haze desulphurization technology before burning in the desulphurization, burning the desulphurization and burning the desulphurization.

This paper describes the overview of flue gas desulfurization technology of coal-fired industry at home and abroad, flue gas desulfurization technology are divided into before and after combustion desulfurization in desulphurization, combustion and combustion desulfurization.

This paper describes the overview of flue gas desulfurization technology of coal-fired industry at home and abroad, flue gas desulfurization technology are divided into before and after combustion desulfurization in desulphurization, combustion and combustion desulfurization.