The emulsion acrylic glueing agent SL 407 was prepared with polymerization process of pre - emulsifying and whole dropping.采用预乳化全部滴加的聚合工艺,制备乳液型丙烯酸酯类水性台板胶.Beeswax acts as an emulsifying agent.蜂蜡起到乳化剂的作用。No colloid, surfac...
这位歌唱家以前从未在纽约演唱过.The singer had never performed in New York before.歌唱家的声音仍萦绕在我耳边.The voice of the singer still rings in my ears.那歌唱家被乐队指挥从舞台上引走.The singer was led off the stage by the maestro....