Warning: file_put_contents(): Only 0 of 4926 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/69228.com/index.php on line 55 良娣软件库,午夜私人影院,无码中字中文字幕在线
Viscometry is an easy measurement, suitable for practic al production, when 29Si-NMR is more accurate. 粘度法具有簡便易行的特點，適於實際生産應(yīng)用，而核磁法所測相對分子質(zhì)量較爲(wèi)準(zhǔn)確。