The invention is mainly open end of a drill pipe thickening processing method, according to the use of drill pipe body known, drill pipe end thickening in the production of drill pipe body is an important influence the quality of the drill pipe links thickening process design determines much ...

該項(xiàng)發(fā)明主要是公開(kāi)了一種鉆桿管端加厚的加工方法日本黄色视频十八岁禁止入内，根據(jù)鉆桿管體的使用情況可知，鉆桿管端加厚在鉆桿管體生產(chǎn)中是影響整個(gè)鉆桿質(zhì)量的重要環(huán)節(jié)无码国产日韩精品一区，加厚工藝設(shè)計(jì)的好壞很大99r热视频在线。。污污亚洲视频视频。

To solve the problems in present hydraulic calculations of gas pipe network such as numerous data-inputting, unprecise output and a lack of hydraulic calculation methods to keep consistent with steady flow and non-steady flow in real working conditions of gas pipe network, in the paper the author has set up a mathematical model of heat transfer process of gas in pipes on the basis of thermodynamic basic theories and obtained more accurate calculation methods of gas storage quantity in long conveying pipes and urban pipe network of high pressure. This research achievement has been applied to real pipe network.

本文研究目的是解決目前燃?xì)夤芫W(wǎng)水力計(jì)算中存在的諸如輸入數(shù)據(jù)繁瑣体验区无码120秒免费、計(jì)算精度不高、缺乏符合實(shí)際燃?xì)夤芫W(wǎng)工況的穩(wěn)定流及不穩(wěn)定流管網(wǎng)水力計(jì)算方法等問(wèn)題欧美丰满熟妇xxxx性,，試圖根據(jù)熱力學(xué)基本理論建立燃?xì)庠诠艿乐袀鳠徇^(guò)程數(shù)學(xué)模型最新偷拍视频，給出較為精確的長(zhǎng)輸管線及城市高壓管網(wǎng)儲(chǔ)氣量的計(jì)算方法，并將研究成果應(yīng)用于實(shí)際管網(wǎng)運(yùn)行中欧美极品网站在线观看免费高清。

Then the flow in the curved pipe and reducing pipe was simulated through using CFD software, know that fluid passing curved pipe, reducing pipe can form secondary flow, vortex shedding, circumfluence, occur separation of boundary layer and periodic circulation flow, make the fluid pulsant, then cause the pipe vibrancy.

然后再應(yīng)用通用CFD軟件對(duì)具有彎曲和變徑的熱風(fēng)爐管內(nèi)流場(chǎng)進(jìn)行模擬，得到當(dāng)流體流過(guò)彎管男女网址、文氏管后形成了二次流国产在线观看精品影院AV、環(huán)流，并發(fā)生邊界層分離和周期性旋渦脫落亚洲一区二区三区偷拍，它們會(huì)使后面的管流處于脈動(dòng)狀態(tài)熟女屁眼，脈動(dòng)狀態(tài)的流體在管內(nèi)流動(dòng)時(shí)，會(huì)引起管道系統(tǒng)產(chǎn)生振動(dòng)午夜在线观看国产剧情电影网。

Drainage system Design of drainage system is it discharge way drain off water the sureness of the system to include; Calculation of the flow of second of design of the sanitary sewage drainage pipeline of the building ; Is it in charge of sideways to drain off water , water conservancy in charge ofed to set up calculate and in charge of pipeline slope , pipe diameter and sureness of elevation sideways, set up calculation to in charge of pipe diameter , is it confirm pipe diameter size and position and sewage waste water design of the inspection shaft after discharging of breather pipe to come from this.

消火栓給水系統(tǒng)消火栓給水系統(tǒng)的設(shè)計(jì)內(nèi)容具體包括：根據(jù)建筑物性質(zhì)選擇設(shè)計(jì)參數(shù)欧美黄色网站A，包括每支水槍的射流量、消火栓的口徑国产视屏大全、水槍口徑开心色亚洲、龍帶長(zhǎng)度等；消火栓系統(tǒng)計(jì)算美女裸体黄18禁免费网站，具體包括消火栓的布置計(jì)算和消防立管和橫支管的水力計(jì)算av成人在线一区二区；減壓孔板的計(jì)算；消火栓設(shè)施的確定直接免费可以观看的黄色网站，包括水泵結(jié)合起的設(shè)置欧美三级视频欧美激、消防水泵和泵房的要求。

At present the company's products have been the formation of series production, including electric air conditioner pipe, electric water heaters heat pipes, oil-filled heaters (Oil-filled Electric Radiator) heat pipe, dry pipe,heating plate, boiler heat pipe, heat pipe fittings, etc., series, products widely used in air conditioners, electric water heater, furnace oil-filled heater, oven, microwave ovens, washing machines, dishwashers,, drinking fountains , bread and other types of heating appliances charged Products.

目前公司的產(chǎn)品已形成系列化生產(chǎn)BBBⅹBBBXX，主要包括空調(diào)器電熱管一级欧美视频、電熱水器發(fā)熱管超碰啪啪黄色一级网站、充油爐發(fā)熱管、干燒管第二色网站、電灶發(fā)熱盤_级大黄片、水煲發(fā)熱管、潔具發(fā)熱管等七大系列思思99精品视频，產(chǎn)品廣泛應(yīng)用于空調(diào)器性交a级视频免费看、電熱水器、充油爐電暖器影音先锋全部AV资源、烤爐可以免费在线观看的黄色网站、微波爐、洗衣機(jī)日韩人妻无码系列专区、洗碗機(jī)干欧美女人视屏、電灶、飲水機(jī)一区二区毛片视频在线、面包機(jī)等各類帶電加熱類的家電產(chǎn)品在线鲁。

In order to improve the quality of "Xintongda" brand hot-galvanize series products and guarantee to carry out the latest national standard of GB3640-88 and GB/T2518-88, in Beijing and Guangzhou, we have invested large quantity of funds to introduce American Sendzimir hot-galvanize production line to manufacture "Xintongda" brand hot-galvanize series, including hot-galvanize braiding pipe, square pipe, rectangle pipe, circular pipe, wire pipe, electric cable bridge truss, C-steel and strip steel, etc. The products have enjoyed a good reputation for their best quality, various varieties and considerate after-service.

為提高&新通達(dá)&牌熱鍍鋅系列的品質(zhì)，保證產(chǎn)品嚴(yán)格執(zhí)行GB3640-88和GB/T2518-88最新國(guó)家標(biāo)準(zhǔn)欧美一级片综合操，在北京色色视频看片，廣州等科研單位的協(xié)助下，我們又投入了大量資金另类图片亚洲色图，引進(jìn)了美國(guó)森吉米爾熱鍍鋅生產(chǎn)線人妻Av洒巴，從而使熱鍍鋅穿線管，方型管看一级日屄黄片免费视频，矩形管激情国产系列在线观看视频免费网站，圓形管，線槽成熟丰满熟妇高朝XXⅩ，電纜橋架国产午夜福利在线对白，C型鋼及帶鋼等&新通達(dá)&牌熱鍍鋅系列的質(zhì)量更保證，品質(zhì)更超群小12萝裸乳无码无遮AAAAAA，品種更繁多国产迷晕暴力玩弄网站。

The main applications are oil or gas transfer pipe; pipe for oil well bushing; transfer pipe for medium or low pressure water, gas, oil; pipe used in the structure of low and medium pressure boiler、engine boiler heat exchanger and condenser; pipe for construction国产怡红院、iron tower欧美亚洲福利、frame structure、tubular pile欧洲黄色视频在线观看、stanchion and other structures; pipe for mechanic欧美精品熟妇人妻在线视频、engine、automobileAAA片免费不卡、apparatus and other mechanical accessories.

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In this paper, through the practice of solving roll marks on steel pipe, on spiral welded pipe of N820 in the steel pipe factory of Shengli oil-field ManagEment, the reason of roll marks occurence on steel pipe was primarily analysized, and some measures to reduce the roll barks of pipe are put up.

通過(guò)在勝利石油管理局鋼管廠820螺旋焊管機(jī)組上解決鋼管壓痕問(wèn)題的生產(chǎn)實(shí)踐啊使劲c我高清在线观看，對(duì)管體壓痕產(chǎn)生的原因進(jìn)行了初步分析超碰人妻久久，并提出減輕鋼管壓痕的一些具體措施。

In order to meet the 21st century, mankind's most advanced load pipeline demand, Donghong industry representatives took the lead in the country to introduce the most advanced level of today's international steel mesh skeleton polyethylene pipe, high pressure steel wire braided reinforced polyethylene composite pipe, Germany, PP-R pipe , polyethylene pipe, UHMW wear, corrosion, acid and alkali pipe production line and injection molding machine, and through advanced detection methods, excellent product quality, perfect after-sales service, creating a "Donghong" This well-known brand.

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In general, the working pressure of steam is not more than 0.8 Mpa and the temperature of air will be below 150℃. The wing radiator consists of three rows of paratactic screw wing pipe mainly. The paratactic screw wing pipe is made through winding 05*10mm of steel belt onto 18mm steel pipe and then zinc hot galvanized. It can also be made with full stainless steel pipe and belt. Model SRL radiator is made of steel pipe and aluminum belt through rolling. Its radiation area in unit length is more than Model SRZ.

翅片式散熱器主要由空氣流向間的三排并列螺旋翅片管束組成亚洲精品第一国产综合精品91，SRZ型散熱翅片管束的加工工藝是反0.5*10毫米的鋼帶用機(jī)械繞片方法，繞在18毫米無(wú)縫鋼管上无码一级毛片一区二区视频r区，然后進(jìn)行熱鍍鋅毛片网址在哪里，也可用不銹鋼管及不銹鋼帶制成全不銹鋼散熱器女人被男人桶30分钟动态图，SRL型散熱器則是用鋼管和鋁帶軋制的翅片散熱器，其單位長(zhǎng)度的散熱面積比SRZ型的更大美国a级大黄片。