缔和聚合物较 非 缔合聚合物而言是一种比较好的酸液稠化剂.Association polymer than the non - associated polymer is a relatively good acid viscosifier.通过对稠化剂和抗磨添加剂的筛选,研究以水为分散介质的润滑脂.Lubricating greases with water as dispersing media are studied by scr...
His visitor's visa expired.他的访问签证过期了。He is assiduous over his visitor.他对来访者很殷勤....as soon as she saw that it was a visitor and not a hawker or tramp at her door.她一看到门口站着的是位访客而不是街头小贩或流浪汉…A visitor savors a twilight r...