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The main production equipment has a large bending machine, shearing machine, VS-300 metal profile circular saw machine, automatic multi-type spot welder, Y32-315F Four-column hydraulic press, J23-63 four-post presses, such as open dumping windows the production of special equipment and can produce its own large-scale mold tooling, in order to ensure product quality and new product development to provide strong technical support.

主要生产设备有大型折弯机、剪板机、VS-300金属型材圆锯机、自动多头式点焊机、Y32-315F四柱液压机、J23-63四柱开式倾压力机等门窗制作专用设备，并可自行制作大型工装模具，为确保产品质量和新产品研制提供强有力的技术保障。

Trade and Long" brand series products include: automatic dual-precision four-post, unilateral hydraulic cutting machine, precision four-post Hydraulic Cutting Machine, Gantry Hydraulic Cutting Machine, Hydraulic Plane Cutting Machine, Rocker hydraulic cutting machine, such as the top ten series more than 60 varieties, the product best-selling domestic and international markets."

"贸隆"牌系列产品涵括：精密四柱式全自动双、单边液压裁断机、精密四柱式液压裁断机、龙门式液压裁断机、平面式液压裁断机、摇臂式液压裁断机等十大系列六十多个品种，产品畅销国内、国际两大市场。

Hangzhou is in fact an ordinary residents of the western district, a four-story residential buildings in a four-bedroom house, the area of 150 square meters.

其实就是杭州西部一个普通的居民小区中，一座4层居民楼中的一套四居室的房子，面积有150平方米。

Now the most common water-cooled four-stroke inline four-cylinder machine as an example, to talk about the optional points.

现以最常见的水冷四冲程直列四缸机为例，来谈谈选购的要点。

Methods of work divided by two-stroke and four-stroke two kinds, general engine four-stroke engine.

按工作方式分有二冲程和四冲程两种，一般发动机为四冲程发动机。

An electric four-way lumbar support is available as an option, as is heating for the front seats or all four seats.

电动4路腰椎支持，可作为一种选择，由于是加热前排座椅或全部四个席位。

A light four-wheeled horse-drawn carriage; has two or four seats.

轻便的四轮的马车；有两个或四个座位。

The four-wheeler change direction already at from abroad usher in of engineering vehicle top get actual application, such as the United States CMI Terex of four track cement the stand spread the machine SF-3004 and the United States Case company of 560 dig ditch machine etc..

四轮转向已在从国外引进的工程车辆上得到实际应用，如美国CMI Terex的四履带水泥摊铺机SF-3004和美国Case公司的560挖沟机等。

This four-wheeler change direction system to also have a safety device, be when the four-wheeler change direction vehicle to press system or controller occurrence break down because of the liquid, the safety device will make behind round instauration to neutral change direction, make vehicle reply to general front rotate to vehicle of operation, in order to prevent result in line car of dangerous.

此四轮转向系统亦配有安全装置，当四轮转向车辆因液压系统或控制器发生故障时，安全装置会令后轮恢复至中立转向，使车辆回复至一般前轮转向车辆之操作，以免造成行车之危险。

The development direction changed direction according to the four-wheeler, the domestic and international company changes direction organization to control to the four-wheeler currently main adoption of is a numeral control, this is owing to a lot of advantages of numerical control:the procedure turn a control, the controller carries on the processing of operation and numerical information according to the control regulation designed, mainly passing procedure to carry out, if change control regulation need to change software, but need not change the hardware structure of system: control the accuracy is high, in the emulation the control the system, the accuracy of the controller from the accuracy of the component but settle, numerical controller accuracy from word long decision;Stability good;The software replies to use, needing a hardware environment of using the homology realization in the emulation the system, the numerical controller is a procedure control, the sub- procedure mold piece which need to be designed and write to carry out its model, can immediately carry out several links of functions expediently.

目前各个厂家大多采用的是PLC、单片机应用于四轮转向控制器中，功能基本能够实现，相比较之下，信号处理能力较强的数字信号处理器各方面均性能优于以上三种处理器。DSP是新世纪数字化革命的核心。它是一种独特的微处理器，具有可编程性，且实时运行速度远远超过通用微处理器。强大的数据处理能力和高速的运行速度，是DSP最值得称道的两大特色。DSP芯片是一种特别适合进行数字信号处理的微处理器。它强调运算处理的实时性，因此除了具备普通微处理器所强调的高速运算和控制功能外，主要针对实时数字信号处理，在处理器结构、指令系统和数据流程上做了很大的改动。它具有灵活、精确、可靠性好、体积小、功耗低和易于大规模集成等优点。

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。