Thick cobwebs hung in the dusty corners.积有灰尘的角落挂着厚厚的蜘蛛网。Under the coating of dust and cobwebs, he discovered a fine French Louis XVI clock.在一层灰尘和蜘蛛网底下，他发现了一座精美的法国路易十六时期的时钟。The new editor will rid the 18 th - century text...
Two symposia are scheduled for the ESC Congress 2007 on this subject.在这个领域,两个会议被安排在2007ESC大会上.Moreover, the coordinator participated in four international conferences and symposia, gave talks or showed papers.此外, 项目执行期间,...
a cryogenic storage system低温冷藏系统Foamed plastic materials containing many small cells which are not connected are good cryogenic insulating materials.塑料泡沫材料含有许多互不相通的小气囊,是优良的低温绝缘材料.Trapping gas pump include: adsorption, su...
At first, the thermodynamic calculation of Solid Ducted Rocket is researched.在此基础上,首先对固体冲压发动机热力计算展开了研究分析.Sound cover allowsa ducted cooling air outlet , from side only or from both front and back.隔音罩引导冷却空气从一侧或两侧及背面排出.So,...