Water - borne polyurethane is the predominant material of membrane pressing adhesive.水性 聚氨酯是真空吸塑胶的主要成分.The water - borne polyurethane was based on polyester diol and toluene diisocyanate etc.以聚酯多元醇、甲苯二异氰酸酯为主要原料合成了 水性 聚氨酯...
He complained about BBC announcers eliding their words.他抱怨说英国广播公司播音员省略了他们的话。There are two announcers of this concert, a female and a male.这场音乐会有两个报幕员, 一位女士和一位男士.Some persons objected that announcers'articulation was...