伸缩

According to the working feature of the elastic belt conveyor,an automatic tensioning device is designed.

针对长距离可伸缩大型带式输送机的工作特点，设计了一种自动张紧装置。

The clicks and thumps tell us that we are passing over expansion joints put in to allow room for the metal rails and the concrete to expand.

咔嗒声和噔等声告诉我们，我们正在经过伸缩接缝处，这是为铁轨和混凝土膨胀而留下的空间。

A pair of retractable wheels in front are also provided.Along with the coupling or uncoupling operation,they can be raised or lowered automatically.

在车辆的前部另外安装有一对伸缩轮，随着接合和分离操作的进行，它们能够自动的张紧和放松。

Social mobility indicates the altering position of people in the social structure.The English social hierarchy is a flexible system that vitalizes the whole society in the eighteenth century.

社会流动可以改变人们在社会结构中的位置。18世纪英国社会是一个易于伸缩的社会分层系统，通过社会流动给整个社会注入了活力。

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

Companies focus on product quality and technology development, by virtue of solid scientific research and development strength, rich production experience, introduced in 2009 with the international standards of luxury all-steel door automatically extendable, and its exquisite technology, stable performance, generous style appearance, with sleek design , there is a very spirited!

公司注重产品质量及技术开发，凭借雄厚的科研开发实力，丰富的生产经验，在2009年推出具有国际水平的豪华全钢自动伸缩门，其工艺精美，性能稳定，外型大方气派，具有流线型设计，极富有时代气息！

Safety Facilities: traffic lights, traffic signs, solar sign series, roadblocks lights, electronic warning light, road crossings deceleration zone, Wheel Locator, safety alerts cone, electronic flash road cone, crossing pillars, isolation column, Traffic precursor, reflector retaining angle, wide angle lenses, water horse, holding the command, boldface warning, railroad crossing shockproof pad, rail pads, rubber bridge stretching devices, rubber, such as reflective vests.

交通安全设施：交通信号灯、交通标志、太阳能标志系列、路障灯、电子警示灯、公路道口减速带、车轮定位器、交通安全警示锥、电子闪光路锥、道口立柱、隔离柱、分道体、反光护角、广角镜、水马、指挥捧、警示横杠、铁路道口防震垫、钢轨垫片、橡胶桥梁伸缩装置、橡胶止水带、反光背心等。

Three individually flexing shaving heads are connected by a ball joint system making them swivel, rotate, and pivot with a full range of motion.

三是个别伸缩刀头连接系统由一球使他们联合旋转，旋转和枢轴具有品种齐全的议案。

When selecting a baby ball python, the snake should have good body weight and muscle tone.

在选一条小球蟒时，这条蛇应该有好的体重和伸缩自如的肌肉感。

The essentials of design for pier plate prestressed stretching bed and treatment on expansion joint structure are emphasized. Based on the comparison and calculation to this structure in non - linear finite element method with Duncan - Chang model, and through site test, it is proved to be rational in design, simple in structure and convenient in construction.

着重讨论墩板式预应力张拉台座强度和温度应力计算的设计要点及伸缩缝的构造处理，并采用 Duncan－ Chang模型对该结构进行了非线性有限元的对比计算，同时配予现场试验观测印证，说明墩板式张拉台座设计合理、结构简单、施工方便。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！