他忽然打了一阵呃逆.He suddenly had an attack of the hiccups.呃逆在术后期间很令人烦恼.Hiccups can be very annoying in the postoperative period.慢性呃逆是一不易治疗的疾病,其发生机制尚不明确.Chronic hiccup is an intractable disease and its pathogenesis is still uncl...
相比较而言,端环氧基聚氨酯醚海岛结构增韧剂的综合性能较好.Among them , sea - island structure flexibilizer had good synthetical properties.与其他增韧剂相比, BDS对PP的增韧性能较好.Compared with other toughening agents, BDS is a better one for PP.主要介绍了奇士增韧剂对YJ型环氧树脂浸渍...
Its main components include propane, butane and butylene.主要成份是丙烷 、 丁烷、丁烯等.Catalytic oligomerization of remain butylene is a way for enterprises to rebottle andpotentialities for more benefits.剩余丁烯催化齐聚是企业消除瓶颈、挖潜增效的途径.By m...