Warning: file_put_contents(/www/wwwroot/ppbbbu/n94.cn/cache/1032003817edc049d46651bd6e959a56.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/n94.cn/index.php on line 55 ashless paper例句_ashless paper英汉例句_ashless paper双解例句_94生活常识网有道词典
In this paper, its history was introduced. The functional elements and their action mechanisms of ashy and ashless additives were analyzed. 文章简要介绍了消烟助燃剂的发展史，对有灰型与无灰型消烟助燃剂的功能单元及作用机理进行分析。