双层的

Research results: The proposals are offered that for ballastless track it should be given priority to lay open latch impressed rail with iron tie plate and spring having bolt, to equip with iron tie plate and single layer or double layers elastic bedding, and to equip with no bed retaining fastenings for sub -rail foundation.

研究结果：提出了无碴轨道宜优先采用带铁垫板的分开式、弹条有螺栓扣压钢轨和铁垫板、单层或双层弹性垫层、轨下基础不设挡肩扣件的建议。

Based on the principle of double-layer wall sound insulating and porous absorption, a six cubic meter isolation booth is designed according to the characteristics of stored grain insect action sound.

基于双层墙隔声和多孔吸收原理，结合储粮害虫活动声的特征，设计了一种体积为6立方公尺的隔声室。

The characteristics of charge storage in APCVD Si 3N 4/thermal\|grown SiO 2 double layers electret films, charged by coroma were investigated by measurements of isothermal surface potential decay and thermally stimulated discharge.

利用等温表面电位衰减及热刺激放电(thermallystimulateddischarge ，TSD)方法探讨了恒栅压电晕充电经常压化学气相沉积的Si基Si3N4 和热生长SiO2 双层薄膜驻极体电荷的存储特性。

THE empty house, in a middle-class corner of southern California, is two storeys high and boasts a three-car garage. Roses bloom around a kidney-shaped swimming pool, which is green with algae.

在南加州一个中产阶级聚居区，坐落着这样一套双层空置住宅，它带有一个可以停放三辆车的巨大车库，院中有个半环形的游泳池，池边开满了玫瑰，然而池水中却长满了青苔。

OD estimation was divided into fixed steps, with every step containing a bi-level programming. The upper-level problem was a generalized least squares estimator, while the lower level problem was a stochastic user equilibrium model. Namely, based on generalized least squares estimator and stochastic user equilibrium, a new estimator of the OD matrix was proposed by target matrix and traffic counts updating.

将OD估计分为固定的步数，每一步都是一个双层规划，上层为广义最小二乘估计，下层为随机用户均衡分配模型，即以广义最小二乘估计和随机用户均衡分配模型为基础，通过更新估计模型中目标矩阵和实测路段上的流量来估计OD矩阵。

This company is specialized in production and processing enterprises of 24K yellow gold mosaic, double glass, mosaic and so on . The company is headquartered in Xinanjiang Lotus Victory Industrial Park,Jiande City, Zhejiang Province. And we have a complete and scientific quality management system.

本公司是24K黄金马赛克、双层玻璃马塞克等产品专业生产加工的企业，公司总部设在浙江省建德市新安江莲花胜利工业园区，本单位拥有完整、科学的质量管理体系。

Considering the influence of inner ornament of vehicle, the internal scattered sound field of multilayer elastic/nonelastic cavity is studied theoretically in the paper.

考虑到汽车内饰的影响，本文从理论上研究了双层弹性/非弹性壳体的内部散射声场。

The sound transmission coefficient of normal incidence is presented.

对影响水中双层穿孔板垂直入射声压透声系数的各项因素进行了详细的仿真分析与讨论。

Excellent quality bridle manufactured of soft leather from Australia with double raised stitching on the browb and , noseband and reins .

这套精美的马缰以柔软上乘的澳洲皮革为材质并配以眉带，鼻带和缰绳处双层浮雕花纹缝制式样。

The observation window on the door is made of double-layer tempered glass, the material heated in the oven can be observed clearly, meanwhile, the thermal insulation is well.

箱门观察窗为双层钢化玻璃结构，能清晰观察箱内加熱的物品，又有良好的隔热效果。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。