查询词典 ballast

The support framework is ballasted with any convenient material to counterbalance the load; in a development, one or more containers of water are used as ballast.

支撑框架由任何方便的物体压载以平衡负荷。在一个发展中，使用一个或多个水罐作为平衡压载。

Wheel/rail noise of the high-speed slab track on concrete bridge and that of the urban elevated supporting block track are predicted respectively. Noise of the slab track, compared with that of the ballasted track, is more severe. The noise of the slab track is about 6.2dBA higher than that of the ballasted track for the receiver nearby the rail, and about 3.5dBA higher than that of ballast track for the receiver

对降低高速铁路桥上板式无碴轨道及城市轨道交通桥上支承块式无碴轨道轮轨噪声的技术措施进行了研究，包括：(1)分别就板式轨道和支承块式轨道结构参数的低噪声设计原则进行了研究；(2)对几种典型的新型轨道用吸声材料的降噪效果进行了分析，结果表明降噪效果显著；(3)就声屏障高度、位置、形状以及声屏障内侧敷设吸声材料对降噪效果的影响进行了分析，结果表明：声屏障越高、越接近轨道，降噪效果越好；声屏障内侧敷设吸声材料，可降低钢轨近旁噪声2.0～3.0dBA，可降低近地面噪声约1.5～2.0dBA

For fixture models that may use different ballasts either in terms of the type of ballast or manufacturer

对使用不同镇流器的产品（不同的镇流器类型或制造商），每款灯具或镇流器都必须经过测试，测试结果须提交作认证之用。

This pressure very gradually expels ballast water through the pump .

这个压力非常逐步驱逐压载水通过泵。

On the railway line nuder normal major repair cycle , RM-80 full section undercutting ballast cleaning machine has enough excavation ability in working condition , productivity can come up with its design standard .

对于正常大修周期的线路上，RM80型全断面道碴清筛机作业运行工况具有足够的挖掘能力，作业效率基本上能够达到其设计标准，这些在国外已经得到了充分的证明。

The contents of a basement or attic were being culled, and the bill had turned up in one of the many cardboard reliquaries that have long lent a kind of ballast to my childhood home.

内容的地下室或阁楼上被扑杀，而该条例草案已变成了在其中的许多纸板reliquaries了长期困扰伸出了种镇流器，以我的童年的家。

The Electronic BaLlast is a kind of electronic equipments unitizing the ignoring and current limiting .

电子镇流器是集点燃与限流为一体的电子装置。

With the small signal modeling of the rated working point proposed in this dissertation, we can applying the classic control theories to explain why gas discharge lamp can't work steady whiling connecting to the voltage souce, we also can design the electronic ballast's stable characteristics.

本文提出的气体放电灯在某一个额定工作点的小信号模型，能应用经典控制理论对具有负阻特性的气体放电灯直接接到电压源上时不能稳定工作的特性作了定量的方法，为电子镇流器稳定性设计和判别打下了一个基础。

With this modeling, we can clearly get to know the innate character of accoustic resonance and also know how to elimate the accoustic resonance whiling designing the HID electronic ballast.

通过这一模型的建立，使我们对高强度气体放电灯声谐振的本质有一个清晰的认识，也为在电子镇流器设计时如何消除声谐振现象指明方向。

Relationship between forces born by bridge and rail under the action of temperature variation, deflection and braking are analysed by using bridge ballast rail as an unified model , and simply supported bridges, 30 m and 40 m in span length, are calculated with a programme of finite element of two dimensional frame structure.

利用桥梁—道碴—轨道的统一模型，对桥梁温度伸缩、桥梁挠曲作用以及制动力作用下的桥轨受力关系进行了分析，并利用平面杆系有限元程序对30m及40m简支梁桥进行了计

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐