你在标签上涂胶了 吗 ?Have you gummed the labels?在使用拉伸聚丙烯薄膜覆膜时,必须在膜上涂胶.In the use of plastic mulch for BOPP film at prbroin gelatinize.涂胶机固化剂系统,为全封闭系统,杜绝了空气的混入.The curative agent system is completely closed and air proof....
Limonene needed in recycling foamed polystyrene was extracted from the ear of schizonepeta tenuifolia using ligroin.本文研究从荆芥穗中提取回收聚苯乙烯所需的柠檬烯,其方法是溶剂萃取....
Sumner would greet us with frowns and grimaces, doing his best to express wordless disapproval.萨姆纳会冲我们皱眉，做苦脸，竭力表示他无言的反对。The most ridiculous grimaces were purposely or unconsciously indulged in.故意或者无心地扮出最滑稽可笑的鬼脸.I don...