青云翻译

This stage of coal depolymerization and decomposition releasing large amounts of volatile, it has become semi-coke;

Coal depolymerization occurs during this phase and after decomposition releases large amounts of Volatiles, char;

In after this stage the coal has the depolymerization and the decomposition releases the massive volatile matter, turns semi-coke;

depolymerisation coal occurs in this phase and sub-explained emit large quantities of volatile and have become semi-coke;

Coal depolymerization occurs during this phase and after decomposition releases large amounts of Volatiles, char;