【正文】 所有制的中小企業(yè)迅猛崛起，呈現(xiàn)出外文資料翻譯 3 勃勃生機。目前我國已和美國、日本、德國等國著名廠商合資或由外國廠商獨資建立了柱塞泵 /馬達、行星減速機、轉(zhuǎn)向器、液壓控制閥、液壓系統(tǒng)、靜液壓傳動裝置、液壓件鑄造、氣動控制閥、氣缸、氣源處理三聯(lián)件、機械 密封 、橡塑密封等類產(chǎn)品生產(chǎn)企業(yè) 50 多家，引進外資 2 億多美元。據(jù) 1995 年全國第三次工業(yè)普查統(tǒng)計，我國液壓、氣動和密封件工業(yè)鄉(xiāng)及鄉(xiāng)以上年銷售收入在 100 萬元以上的國營、村辦、私營、合作經(jīng)營、個體、 “三資 ”等企業(yè)共有 1300 余家，其中液壓約 700 家，氣動和密封件各約 300 余家。 在軟件設(shè)計采用模塊化設(shè)計，不同的液壓保護裝置用在不同的礦中，這使高性能控制器的軟件存在很大的差異 。另外，在液壓氣動元件和系統(tǒng)的 CAD、污染控制、比例伺服技術(shù)等方面也取得一定成果，并已用于生產(chǎn)。其中，液壓有 1200 個品種、 10000 多個規(guī)格（含液力產(chǎn)品 60 個品種、 500 個規(guī)格）；氣動有 1350 個品種、 8000 多個規(guī)格；橡塑密封有 350 個品種、 5000 多個 規(guī)格，已基本能適應(yīng)各類主機產(chǎn)品的一般需要，為重大成套裝備的品種配套率也可達 60%以上，并開始有少量出口。據(jù)中國液壓氣動密封件工業(yè)協(xié)會 1998 年年報統(tǒng)計，液壓產(chǎn)品產(chǎn)銷率為 97 .5%（液力為 101%），氣動為 %，密封為 %。 我國液壓、氣動和密封工 業(yè)雖取得了很大的進步，但與主機發(fā)展需求，以及和世界先進水平相比，還存在不少差距，主要反映在產(chǎn)品品種、性能和可靠性等方面。為了滿足重點主機、進口主機以及重大技術(shù)裝備的需要，每年都有大量的液壓、氣動和密封產(chǎn)品進口。按金額計，目前進口產(chǎn)品的國內(nèi)市場占有率約為 30%。 現(xiàn)場總線的使用上，在德國的 EEP 公司采用現(xiàn)場總線技術(shù)實現(xiàn)信息的傳遞，而 MARCO 公司使用自定義格式收集器技術(shù)。目前，在國內(nèi)運用成熟和廣泛的的 CAN 總線技術(shù)是德國 BOTCH 公 司提出的?，F(xiàn)場總線地下工作時需要特殊處理。通常每個電源只能提供五或六個控制器 ，電磁先導(dǎo)閥的電量。為了為了避免電流不平衡導(dǎo)致破壞原有的安全性，控制器之間的數(shù)據(jù)信號需通過信號隔離器，可以實現(xiàn)電氣信息的通斷連接。 隨著社會主義市場經(jīng)濟的不斷深化，液壓、氣動和密封產(chǎn)品的市場供求關(guān)系發(fā)生較大變化，長期來以 “短缺 ”為特征的賣方市場已基本成為以 “結(jié)構(gòu)性過剩 ”為特征的買方市場所取代。在我國加入 WTO 后，其沖擊有可能更大。 外文資料翻譯 1 Hydraulic system Introduction Hydraulic Pump Station also known as the stations are independent hydraulic device. It requested by the oil gradually. And controlling the hydraulic oil flow direction, pressure and flow rate, applied to the mainframe and hydraulic devices separability of hydraulic machinery. Users will be provided after the purchase hydraulic station and host of implementing agencies (motor oil or fuel tanks) connected with tubing, Hydraulic machinery can be realized from these movements and the work cycle. Hydraulic pump station is installed, Manifold or valve bination, tanks, a bination of electrical boxes. Functional ponents : Pump device is equipped with motors and pumps, hydraulic station is the source of power. to mechanical energy into hydraulic oil pressure can be. Manifold from hydraulic valve body and channel assembled. Right direction for implementation of hydraulic oil, pressure and flow control. Valve portfolio plate valve is installed in up board after board connects with the same functional IC. Tank plate welding semiclosed containers, also loaded with oil filtering work, air filters, used oil, oil filters and cooling. Electrical boxes at the two patterns. A set of external fuse terminal plate。 6039。80~9039。s annual output of hydraulic ponents have nearly 200,000 in 1973, machine tools, agricultural machinery, mechanical engineering industries, the production of hydraulic parts factory has been the professional development of more than 100 and an annual output more than one million. an independent hydraulic manufacturing industry has begun to take shape. Then, hydraulic pieces of fake products from the Soviet Union for the introduction of the product development and technical design bining the products to the pressure, Hypertension, and the development of the electrohydraulic servo valves and systems, hydraulic application areas further expanded. Aerodynamic than the start of the industrial hydraulic years later, in 外文資料翻譯 3 1967 began to establish professional pneumatic ponents factory, Pneumatic Components only as modity production and sales. Sealed with rubber and plastics, mechanical seals and sealing flexible graphite sealing industry, the early 1950s from the production ordinary Orings. rubber and plastics extrusion, such as oil seal