【正文】 60% of mechanical systems)。s growth stage for the rapid development stage. Which, hydraulic industry in the early 1950s from the machine tool industry production of fake Soviet Union grinder, broaching machine, copying lathe, and other hydraulic drive started, Hydraulic Components from the plant hydraulic machine shop, selfoccupied. After entering the 1960s, the application of hydraulic technology from the machine gradually extended to the agricultural machinery and mechanical engineering fields, attached to the original velocity of hydraulic shop some stand out as pieces of hydraulic professional production. To the late 1960s, early 1970s, with the development of mechanized production, especially in the second automobile factory in providing efficient, automated equipment, along with the Hydraulic Components manufacturing has experienced rapid development of the situation, a group of SME have bee professional hydraulic parts factory. 1968 China39。從總體能力看，已處于供大于求的態(tài)勢，特別是一般低檔次液壓、氣動和密封件，普遍供過于求；而主機急需的技術(shù)含量高的高參數(shù)、高附加值的高檔產(chǎn)品，又不能滿足市場需要，只能依賴于進口。在實際系統(tǒng)中控制器之間的通信是由雙 RS422 傳遞大量數(shù)據(jù)實現(xiàn)的。以液壓產(chǎn)品為例，產(chǎn)品品種只有國外的 1/3，壽命為國外的1/2。 通過技術(shù)引進，自 主開發(fā)和技術(shù)改造，高壓柱塞泵、齒輪泵、葉片泵、通用液壓閥門、油缸、無油潤滑氣動件和各類密封件第一大批產(chǎn)品的技術(shù)水平有了明顯的提高，并可穩(wěn)定的批量生產(chǎn)，為各類主機提高產(chǎn)品水平提供了保證。經(jīng)過技術(shù)改造和技術(shù)攻關(guān)，一批主要企業(yè)技術(shù)水平進一步提高，工藝裝備得到很大改善，為形成高起點、專業(yè)化、批量生產(chǎn)打下了良好基礎(chǔ)。這時，液壓件產(chǎn)品已從仿蘇產(chǎn)品發(fā)展為引進技術(shù)與自行設(shè)計相結(jié)合的產(chǎn)品，壓力向中、高壓發(fā)展，并開發(fā)了電液伺服閥及系統(tǒng)，液壓應(yīng)用領(lǐng)域進一步擴大。 電氣盒－－分兩種型式。并控制液壓油流的方向、壓力和流量，適用于主機與液壓裝置可分離的各種液壓機械上。各部件功能為： 泵裝置－－上裝有電機和油泵，是液壓站的動力源，將機械能轉(zhuǎn)化為液壓油的壓力能。 我國液壓（含液力，下同）、氣 動和密封件工業(yè)發(fā)展歷程，大致可分為三個階外文資料翻譯 2 段，即： 20 世紀 50 年代初到 60 年代初為起步階段； 60~70 年代為專業(yè)化生產(chǎn)體系成長階段； 80~90 年代為快速發(fā)展階段。 70 年代，在原燃化部、一機部、農(nóng)機部所屬系統(tǒng)內(nèi)，一批專業(yè)生產(chǎn)廠相繼成立，并正式形成行業(yè)，為密封件工業(yè)的發(fā)展成長奠定了基礎(chǔ)。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。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。按金額計，目前進口產(chǎn)品的國內(nèi)市場占有率約為 30%。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。 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。s industry hydraulic billion yuan, accounting for the world39。 aerodynamic pieces of the total demand of about 5 million, with sales more than 700 million yu