求翻译：The present invention is directed to enhancing a liquid for coal dust suppression by adding a metal-containing compound to that liquid. The metal-containing additive is a combustion-improver. The addition of the combustion improver concurrentlywith the dust suppressant allows the coal handler to solve the issues of dus是什么意思？

待解决 悬赏分：1 - 离问题结束还有