The invention relates to a floating foam material that is lighter than air. Airships can be erected like buildings, using such material. Unlike the Zeppelin principle involving gas cells, airships with a useful load of over 50,000 tons can be built with said material.BOESWALD KARL-HEINZ A...
【解析】【答案】A【核心短语/词汇】material:材料;three times:三倍;lighter:更轻的;than:比【翻译】这种新材料比旧的轻三倍。【解析】结合选项可知,本句表达的意思是“这种新材料比旧的轻三倍”,表示三倍或三倍以上的倍数,一般使用基数词+“times(倍)”的结构。A项表述正确;B项和D项中的“third(第三)...
The need for damage-tolerant materials became more intense in the late 1970s when unexpected failures occurred in ultra-high-strength steel components inUnited States Air Force(USAF) aircraft. It became clear that the failures involved manufacturing defects and fatigue cracks so small that they could...
movement or temperature change. This couldremove the need for heavy mechanical control systemsand Airbus is already testing the technology for an air inlet. One day, it could even form the basis of the entire cabin.
METHOD OF MANUFACTURE AND ARTICLE OF MANUFACTURE OF A LIGHTER-THAN-AIR BUILDING MATERIAL This paper describes the results of joint study by the authors and the researchers of Industrial Research Institute of Kochi, Oita and (Fukushima) Fukuoka ... RD Hunt 被引量: 0发表: 2004年 Use of phospho...
aReally cute sweater dress -- lighter material than similar ones I have, so I might not get much use of it until the weather remembers that it's November and not January. But it's soft and the color (Rhone) is lovely. Good value! 真正地逗人喜爱的毛线衣礼服 -- 更轻的材料比我有的...
It is because higher density means smaller pores and less than air volume, resulting in the heat flow through the materials is mainly governed by the thermal conduction of the solid particles, while the effect of the heat transfer by convection and radiation becomes insignificant. This causes a ...
美火素即达火位接少资信圆This new kind of material is ___ lighter than the old one.美火素即达火位接少资
The year 1952 heralded the beginning of the jet age in commercial air transport and the first of these was the de Havilland Comet. However, early in 1954 there were two total failures involving major loss of life. These failures exposed the weakness associated with designing for a safe life ...
Smithsonian Institute https://airandspace.si.edu/collection-objects/stardust-capsule/nasm_A20080417000. The aerogel material used was silica aerogel, one of the most common aerogel materials. We described the processing of silica aerogel in Chapter 6, Techniques for Introducing Intentional Voids into...