久久国产欧美日韩精品,日韩国产精品久久久久久亚洲,99视频精品全部免费免费,91精品国产综合久久走光

dimethylaniline的音標(biāo)：dimethylaniline的英式發(fā)音音標(biāo)為：[da??meθ?l'?n?l?n]dimethylaniline的美式發(fā)音音標(biāo)為：[da??meθ?l'?n?l?n]...

The production methods of N, N - dimethylaniline including liquid - phase and gas - phase method are introduced.介紹了N, N- 二甲基苯胺的兩種生產(chǎn)方法 —— 液相法和氣相法,綜述了N, N-二甲基苯胺國內(nèi)外生產(chǎn)工藝進展.A HPLC method with electrochemical detector for dete...

n.二甲基苯胺...