【正文】 因此， “ 十五 ” 期間行業(yè)產(chǎn)值的增長(zhǎng)，決不能依賴于量的增長(zhǎng)，而應(yīng)針對(duì)行業(yè)自身的結(jié)構(gòu)性矛盾，加大力度，調(diào)整產(chǎn)業(yè)結(jié)構(gòu)和產(chǎn)品結(jié)構(gòu)，也就是應(yīng)依靠質(zhì)的提高，促進(jìn)產(chǎn)品技術(shù)升級(jí)，以適應(yīng)和拉動(dòng)市場(chǎng)需求，求得更大的發(fā)展。 三、今后發(fā)展走勢(shì) 影響發(fā)展的主要因素 (1)企業(yè)產(chǎn)品開(kāi)發(fā)能力不強(qiáng)，技術(shù)開(kāi)發(fā)的水平和速度不能完全滿足先進(jìn)主機(jī)產(chǎn)品、重大技術(shù)裝備和進(jìn)口設(shè)備的配套和維修需要； (2)不少企業(yè)的制造工藝、裝備水平和管理水平都較落后，加上質(zhì)量意識(shí)不強(qiáng)，導(dǎo)致產(chǎn)品性能水平低、質(zhì)量不穩(wěn)定、可靠性差，服務(wù)不及時(shí)，缺乏使用戶滿意和信賴的名牌產(chǎn)品； (3)行業(yè)內(nèi)生產(chǎn)專業(yè)化程度低，力量分散，低水平重復(fù)嚴(yán)重，地區(qū)和企業(yè)之間產(chǎn)品趨同，盲目競(jìng)爭(zhēng)，相互壓價(jià)，使企業(yè)效益下降 ，資金缺乏、周轉(zhuǎn)困難，產(chǎn)品開(kāi)發(fā)和技術(shù)改造投入不足，嚴(yán)重地制約了行業(yè)整體水平的提高以及競(jìng)爭(zhēng)實(shí)力的增強(qiáng)； (4)國(guó)內(nèi)市場(chǎng)國(guó)際化程度日益提高，國(guó)外公司紛紛進(jìn)入中國(guó)市場(chǎng)參與競(jìng)爭(zhēng)，加上國(guó)內(nèi)私營(yíng)、合作經(jīng)營(yíng)、個(gè)體、三資等企業(yè)的崛起，給國(guó)有企業(yè)造成愈來(lái)愈大的沖擊。為了滿足重點(diǎn)主機(jī)、進(jìn)口主機(jī)以及重大技術(shù)裝備的需要，每年都有大量的液壓、氣動(dòng)和密封產(chǎn)品進(jìn)口。據(jù)中國(guó)液壓氣動(dòng)密封件工業(yè)協(xié)會(huì) 1998 年年報(bào)統(tǒng)計(jì)，液壓產(chǎn)品產(chǎn)銷率為 97 .5%（液力為 101%），氣動(dòng)為 %，密封為 %。另外，在液壓氣動(dòng)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)。 二、目前狀況 (1)基本概況 8 經(jīng)過(guò) 40 多年的努力，我國(guó)液壓、氣動(dòng)和密封件行業(yè)已形成了一個(gè)門類比 較齊全，有一定生產(chǎn)能力和技術(shù)水平的工業(yè)體系。經(jīng)過(guò)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(jìn)一步提高，工藝裝備得到很大改善，為形成高起點(diǎn)、專業(yè)化、批量生產(chǎn)打下了良好基礎(chǔ)。 進(jìn)入 80 年代，在國(guó)家改革開(kāi)放的方針指引下，隨著機(jī)械工業(yè)的發(fā)展，基礎(chǔ)件滯后于主機(jī)的矛盾日益突出，并引起各有關(guān)部門的重視。這時(shí)，液壓件產(chǎn)品已從仿蘇產(chǎn)品發(fā)展為引進(jìn)技術(shù)與自行設(shè)計(jì)相結(jié)合的產(chǎn)品，壓力向中、高壓發(fā)展，并開(kāi)發(fā)了電液伺服閥及系統(tǒng)，液壓應(yīng)用領(lǐng)域進(jìn)一步擴(kuò)大。其中，液壓工業(yè)于 50 年代初從機(jī)床行業(yè)生產(chǎn)仿蘇的磨床、拉床、仿形車床等液壓傳動(dòng)起步，液壓元件由機(jī)床廠的液壓車間生產(chǎn)，自產(chǎn)自用。 電氣盒－－分兩種型式。 集成塊－－由液壓閥及通道體組裝而成。并控制液壓油流的方向、壓力和流量，適用于主機(jī)與液壓裝置可分離的各種液壓機(jī)械上。s market has basically bee a structural surplus of the characteristics of the buyer39。 Seals total demand of about billion. total sales of about billion. Third, the development trend of the future 1, affect the development of the main factors (1) product development ability, and the level of technological development and speed can not pletely meet the advanced mainframe products, major equipment and technology imported equipment and maintenance support。 aerodynamic pieces yield million. sales of about billion (of which about 60% of mechanical systems)。s 6。s growth stage for the rapid development stage. Which, hydraulic industry in the early 1950s from the machine tool industry production of fake Sugrinder, 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 2 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 SMEs have bee professional hydraulic parts factory. 1968 China39。 distribution of a full range of electrical control. Hydraulic Station principle : motor driven pump rotation, which pump oil absorption from the oil tank. to mechanical energy into hydraulic pressure to the station, hydraulic oil through Manifold (or valve binations) realized the direction, pressure, After adjusting flow pipe and external to the cylinder hydraulic machinery or motor oil, so as to control the direction of the motive fluid transformation force the size and speed the pace of promoting the various acting hydraulic machinery. A development course China Hydraulic (including hydraulic, the same below), pneumatic and seals industrial development process can be broadly divided into three phases, namely : 20 early 1950s to the early 1960s, the initial stage。 6039。s annual output of hydraulic ponents have nearly 200,000