【正文】 水方面的投資增長率將繼續(xù)高于社會固定資產(chǎn)投資增長率?在城市排水將投資1200億左右, 2005年污水的處理率接近40%,到2015年污水處理率超過60%?所以,我們預測在今后二十年內(nèi)我國將進入建設排水管網(wǎng)的高潮,為塑料埋地排水管創(chuàng)造了空前的發(fā)展機遇?按照《國務院關于環(huán)保若干問題的決定》和建設部《關于城市污水集中處理行業(yè)發(fā)展和設備產(chǎn)業(yè)化工作的初步設想》,2000年 “三江三河”%時,城市污水管網(wǎng)投資為129億元?2010年城市污水集中處理率達到50%時,?其中至少將有40%?另外城市及工業(yè)污水處理是一個潛在的巨大市場?2001年7月北京市人大提出的北京市城市建設提案,共投資1800億元用于市政基本建設,申奧成功后,又追加1000億元,其中200億元用于水?電?氣?暖,800億元用于污水處理?使污水處理達到90%,這兩項預算中有400億元用于管道采購,上?！笆濉逼陂g以計劃投資1500億元用于市政基礎建設,其中400億元用作建設污水處理廠及排水管網(wǎng)建設?上海市?北京市率先淘汰水泥管?推廣使用塑料管,加之城市污水處理投資力度加大,必然帶動全國各地城市掀起“管道革命”的熱潮,新型管道企業(yè)的不斷涌現(xiàn),生產(chǎn)能力不斷擴張,建設部必將出臺政策法規(guī)在全國范圍內(nèi)禁止使用水泥管作為排水排污管道?市場對塑料排水?排污管道需求將急劇增大?如全國人口在50萬以上的城市全部使用塑料排水?排污管道,?HDPE雙壁波紋管生產(chǎn)設備及生產(chǎn)技術(shù)于九十年代初期發(fā)展成熟,目前在發(fā)達國家的諸多領域廣泛使用?尤其在美國?加拿大?日本?韓國及歐洲各國,雙壁波紋管廣泛用于工農(nóng)業(yè)大型輸水?各種領域排水?排污?排氣等?我國近幾年來才開始引進此類設備,且集中于大中型企業(yè),其原因是從國外購置此類設備價格昂貴,每套約400500萬美元,使中小型企業(yè)望而卻步,而大型企業(yè)在發(fā)展規(guī)模上也受資金限制,從而限制了雙壁波紋管的發(fā)展?江蘇欣榮科技發(fā)展有限公司通過引進消化國外先進技術(shù)并對國內(nèi)引進設備進行研究,對比各種結(jié)構(gòu)壁管的優(yōu)缺點推行HDPE擠出成型波紋管生產(chǎn)線,此生產(chǎn)線分600?800二種機型?范圍管徑從225~800mm,填補了國內(nèi)空白,設備價格為600—800萬元人民幣,是替代進口設備的首選產(chǎn)品?三?制品規(guī)格?性能?特點于用途表2:HDPE雙壁波紋管材規(guī)格?尺寸?重量(kg)及售價(元)管材規(guī)格DN225DN300DN400DN500DN600DN700內(nèi)徑225300400500600700外徑260346460578697800單米重量131925原料成本7760萬 /噸標準長度6000mm?9000mm?12000mm1噸管材的原材料包括:,。Unit 4Cambodia was in many ways similar to Laos, although it has twice the population. At another inn, we talked with a teacher who told us that half of the people in her country couldn’t read or write. Her village couldn’t even afford to build a school, so she had to teach outside under a large tent. When we said goodbye, we all felt very lucky to have studied in on the road, we passed between many hills and forests. Then we came to the plains and entered Phnom Penh,the capital of Cambodia. In many ways it looked like Vientiane and Ho Chi Minh City。Although it was autumn,the snow was already beginning to fall in legs were so heavy and cold that they felt like blocks of you ever seen snowmen ride bicycles?That’s what we looked like! Along the way children dressed in long wool coats stopped to look at the late afternoon we found it was so cold that our water bottles froze..However,the lakes shonelike glass in the setting sun and looked rode in front of me as is very reliable and I knew I didn’t need to encourage her. To climb the mountains was hard work but as we looked around us, we were surprised by the view. We seemed to be able to see for miles. At one point we were so high that we found ourselves cycling through clouds. Then we began going down the hills. It was great fun especially as it gradually became much warmer. In the valleys colourful butterflies flew around us and we saw many yaks and sheep eating green grass. At this point we had to change our caps, coats,gloves and trousers for Tshirts and shorts. my sister doesn39。My name is Wang Kun. Ever since middle school, my sister Wang Wei and I have dreamed about taking a great bike trip. Two years ago she bought an expensive mountain bike and then she persuaded me to buy one. Last year, she visited our cousins, Dao Wei and Yu Hang at their college in Kunming. They are Dai and grew up in western Yunnan Province near the Lancang River, the Chinese part of the river that is called the Mekong River in other countries. Wang Wei soon got them interested in cycling too. After graduating from finally got the chance to take a bike trip. I asked my sister, Where are we going? It was my sister who first had the idea to cycle along the entire Mekong River from where it begins to where it ends. Now she is planning our schedule for the trip.Unit 3until the time of the late Qing Dynasty. There men did most of the important early work on dictionaries: Samuel Johnson, Noah Webster, and James Murray. These men spent nearly all of their lives trying to collect words for their dictionaries. For them, it wasn’t only a job。PART 1 THE DREAM AND THE PLANt。PART2 A NIGHT IN THE MOUNTAINSPART 6 THE END OF OUR JOUNEYTwo days later we crossed the border into Vietnam. We began to see many more people,but I wasn’t surprised .I read in an atlas before our trip that Vietnam has almost seven times the population of Cambodia. We met a farmer who gave us directions and told us that he grows a new rice crop four times every year so he can feed more also told us that the northern part of his country has many mountains and it is much cooler than here in the south,where it is the flat delta made it easier for us to got warm very we drank lots of water and ate lots of the delta separated into nine smaller days later,after we had passed thousands of rice fields,we came to the sea. We were tired but also in high spirits:our dream to cycle along the Mekong River had finally e true. At3:42 am everything began to seemed as if the world was at an end!Eleven kilometres directly below the city the greast earthquake