Abstract: Coal industry is an industry of high risk.To lower the prevalence of accident and to raise the safety level are the target that safety researchers assiduously seek for.是什么意思_Abstract: Coal industry is an industry of high risk.To lower the prevalence of accident and to raise the safety level are the target that safety researchers assiduously seek for.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句