Warning: file_put_contents(): Only 0 of 4941 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/69228.com/index.php on line 55 久久国产线看观看,婷婷五月日韩Aⅴ永久免费
The properties manufacture technology of polysulfide sulphone and polysulfide ketone were descussed,the applications about it are described. 綜述了聚硫醚碸,聚硫醚酮的性能,制造工藝,介紹了應(yīng)用領(lǐng)域。