Of course, there are still challenges, such as reducing the weight of the balloons, dealing with wind, and designing the optimal system for transporting the energy down to the surface.
当然，还有很多挑战，例如，减轻气球的重量，处理风的问题，设计最理想的系统传输能量到地面。
A keel also provides weight low under the water to lower the boat's center of gravity below the waterline, which is needed so that the boat bobs back upright if knocked over by wind or waves.
龙骨同时也增加了船只的底部重量，从而将船只重心降到吃水线之下，而这对于船只在被风浪打翻时能够得以及时回正是十分必要的。
AIRPORT ANALYSIS, A comprehensive set of takeoff weight limitations for a given airport runway, generally presented as a function of airport temperature, wind, and aircraft flap setting.
机场分析，一套针对给定的机场跑道的详细重量限制资料。通常与机场温度、风、和飞机襟翼位置成函数关系。
Secondly, the weight of the wind area increases, due to wind generated overturning moment will increase, the stability of poor.
其次，重物挡风面积增大，因风力产生的倾倒力矩也随之加大，稳定性变差。
Born as the roots of great volcanoes, over millions of years they have been deeply eroded by wind and water and rounded by the grinding weight of glacial ice.
这些山峰生为巨型火山的根基，千百万年来已被海风、海水以及冰川磨得棱角全无。
It attains the aim of reducing weight, balanced operation, safe application and reducing wind obstruction.
达到减轻重量，操控平衡，使用安全，减低风阻的目的。
When the weight of the particle can resist the resistance of the wind, it is discharged from the outlet, thus it ensures the accuracy of the particle size.
颗粒重量达到能克服出料口的进风阻力时，就从出料口排出，确保颗粒度的准确性。
The wind velocity of first order instability is obtained from the dynamic equilibrium relationship between aerodynamic force with dead weight and inertia force of membrane.
根据气动力与薄膜自重和惯性力之间的动力平衡关系获得了薄膜一阶失稳时的临界风速。
Features: 1. By type of electrical generator hub for the power output, small size, light weight high efficiency. Truly realized the concept of wind power generation.
产品特点：1。采用盘式发电机为功率输出枢纽，体积小，重量轻，效率高。真正实现了微风发电的理念。
Combined with a bridge, various kinds of wind loadings, deviation of the pier and losing weight of one side are considered.
对施工中的各种风荷载、主墩偏位及主梁一侧失重等情况进行了分析。
The utility model has the advantage of high stability, and can wind coils of different specifications. The coils which are wound are regular, and has light weight.
本实用新型的优点是：稳定性好，绕出的线圈规则，可以绕制不同规格线圈，重量较轻。
Through optimization and comparison, the weight and cost of the tower can be reduced with improved performance of the wind turbine.
通过优化分析可以达到在满足结构性能要求的条件下减轻塔架重量、降低成本的目的。
And it has small volume, light weight, easy installation, stable efficiency, the advantages of uniform wind speed, the clean workshop need large quantities of filter with no partition structure.
加之其具有体积小、重量轻、便于安装、效率稳定、风速均匀的优点，目前洁净厂房所需的大批量的过滤器多采用无隔板结构。
Local small size, light weight, wind big oil less. (This machine first major characteristic of) the greatest advantages of light weight.
本机体积小，重量轻，风力大，用油少。(本机第一大特点)最大优点重量轻。
A wind power generator which makes it possible to reduce size and weight of a nacelle baseplate, and has an excellent serviceability in replacing components, etc.
本发明提供一种风力发电装置，其能够实现机舱台板的小型、轻量化，并且设备更换等的维修性优良。
Obviously bamboo material, something like this, might grow 20 meters and it supports its own weight, and, of course, it also supports huge wind loads …
很显然竹子材料，就像这根，可以长到20米并且可以支撑自身的重量，当然，它也可以承受大风。
Features: 1. By type of electrical generator hub for the power output, small size, light weight and high efficiency. Truly realized the concept of wind power generation.
产品特点：1。采用盘式发电机为功率输出枢纽，体积小，重量轻，效率高。真正实现了微风发电的理念。
Poor quality of the housing not only light weight, and its simple structure can be weak wind.
质量差的活动房不只重量轻，而其构造简单抗风才能弱。
Some explanations for specified values of live load and wind load for Technical Specification for Steel Structure of One-storey Light-weight Buildings with Gabled Frames (CECS102:98) are introduced.
介绍《门式刚架轻型房屋钢结构技术规程》（CECS102：98）活荷载和风荷载标准值的制订依据。
It has a static lift-weight ratio of 0.2-0.8 and thus requires relatively low minimum flying wind force, and this results in more kite flying chance and ever elegant fly effect.
气球以粘贴、网罩或镶嵌的方式与风筝结合成一体。轻体风筝的静态升重比为0．2―0．8，降低了对放飞最小风力的要求，使放飞活动有更多的机会可选择。
Compared with the traditional air purification filter core, the utility model has the advantages of appropriate wind-resistance coefficient, stable efficiency, light weight, low cost, and so on.
与传统的空气净化滤芯相比，本实用新型提供的滤芯具有合适的风阻系数及稳定的效能且质量小、成本低等优点。
The wind meter has the advantages of small volume, light weight, simple structure, convenient use;
该风表体积小、重量轻、结构简单、使用方便；
In design of light railcar used freely supported beam, the cast steel pedestals will bear complex loads, which include weight, acceleration and wind, etc.
跨座式轻轨轨道采用简支梁结构，铸钢支座需承受所有荷载，其强度将对轻轨交通产生决定性的影响。
Finally, a brief discussion is present about the influence of the airplane gross weight, the thrust, the maximum Angle of attack, the flap Angle and the wind over the deck on...
最后讨论了飞机的起飞质量，发动机推力、起飞迎角、襟翼偏角和甲板风航迹等对弹射起飞性能的影响。
Finally, a brief discussion is present about the influence of the airplane gross weight, the thrust, the maximum Angle of attack, the flap Angle and the wind over the deck on...
最后讨论了飞机的起飞质量，发动机推力、起飞迎角、襟翼偏角和甲板风航迹等对弹射起飞性能的影响。
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