Warning: file_put_contents(): Only 0 of 5163 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/69228.com/index.php on line 55 日韩无国内精品,欧美精品视频网站,国产AV熟女一区二区三区蜜桃
1. N a colourless insoluble liquid ketone used as a solvent for organic compounds, esp nitrocellulose; 4-methylpentan-2-one. Formula: (CH3)2CHCH2COCH3 甲基異丁基酮 (Also called hexone)