Polyether - type isocyanate prepolymers are prepared with polyether polyols and tolylene diisocyanate.采用聚醚多元醇和甲苯二异氰酸酯合成了聚醚型异氰酸酯预聚体.A polyamide imide was synthesized from trimellitic anhydride and di isocyanate.本文用偏苯三酸酐和二...
Situations of preparing isocyanate trimers at home and abroad are mainly introduced.主要介绍国内外异氰酸酯三聚体的制备状况.Polyether - type isocyanate prepolymers are prepared with polyether polyols and tolylene diisocyanate.采用聚醚多元醇和甲苯二异氰酸...
We were driven across this wondrous vast land of lakes and forests.我们乘车穿越这片有着湖泊及森林的广袤而神奇的土地。Underwater photography, however, has brought the wondrous world of the deep closer to the'landlubbers '.然而, 水下摄影帮助那些无法...
In going through the earth's atmosphere the light from an extraterrestrial bodies suffers considerable absorption.从地球以外的所有星体射来的光,在通过地球大气时,都会遭受很大的吸收.From Kudo to Edogawa Shinichi suffers a lot of pain that we could n...
If I hadn't taken the hippocratic oath , I'd kevorkian her with my bare hands.如果我不是外科医生, 我真想用我赤裸的双手掐丝她.However, Dr. Kevorkian is an exception.然而, 凯渥肯医生是个例外.I don't understand how people can think Dr. Kevor...
Esthetically, it is of beauty of both simplicity and complexity.从美学上讲, 它既具有简单性美,又具有复杂性美.Generally thought that Mozi denied art, he did not say esthetically.一般认为墨子是否定艺术, 不言审美的....