亚洲乱码视频,青青草久久夜欧美日本道亚洲,狠狠狠狠一区,综合鸡巴网

當(dāng)前位置:首頁(yè)  >  新聞動(dòng)態(tài)  >  簡(jiǎn)述閥門的歷史

簡(jiǎn)述閥門的歷史

更新時(shí)間: 2022-08-30      點(diǎn)擊次數(shù): 3629

閥門的歷史
閥門是隨著流體管路的產(chǎn)生而產(chǎn)生的。人類使用閥門已經(jīng)有近4000年的歷史了。中國(guó)古代從鹽井中吸鹵水制鹽時(shí),就曾在竹制管路中使用
過(guò)木塞閥。公元前1800年,古埃及人為了防止尼羅河泛濫而修建大規(guī)模水利時(shí),也曾采用過(guò)類似的木制旋塞來(lái)控制水流的分配。這些都
是閥門的雛形。工業(yè)用閥門的大量應(yīng)用,是從萬(wàn)特發(fā)明蒸汽機(jī)以后才開(kāi)始的。二十世紀(jì)初出現(xiàn)了鑄鐵,鑄鋼,鍛鋼,不銹鋼,鉻鉬鋼,黃
銅等各種材質(zhì)的閥門。應(yīng)用干各個(gè)行業(yè),各種工況。國(guó)內(nèi)ZUI早引進(jìn)國(guó)外閥門生產(chǎn)技術(shù)的公司不多,后引進(jìn)國(guó)外生產(chǎn)技術(shù),使得國(guó)內(nèi)閥門生
產(chǎn)技術(shù)的突破,質(zhì)量的提高,壽命的加長(zhǎng)。

History of Valves

The valve is produced with the flow line. Humans have been using valves for nearly 4,000 years. In ancient China, when brine was siphoned from salt Wells to make salt, it was used in bamboo pipes

Pass the plug valve. Similar wooden cocks were used by the ancient Egyptians in 1800 BC to control the distribution of water when they built a massive water conservancy to keep the Nile from flooding. All of these

It's the prototype of the valve. A large number of industrial valve applications, from the invention of the steam engine Vante only began. In the early 20th century, cast iron, cast steel, forged steel, stainless steel, chrome-molybdenum steel, yellow

Copper and other materials of the valve. Applied to various industries, various working conditions. The earliest introduction of foreign valve production technology companies are not many, after the introduction of foreign production technology, so that the domestic valve

The breakthrough of production technology, the improvement of quality, the extension of life.

版權(quán)所有?2021工奧閥門版權(quán)所有    備案號(hào):浙ICP備19014983號(hào)-3    技術(shù)支持:環(huán)保在線    Sitemap.xml    管理登陸

聯(lián)系我們

contact us

咨詢電話

13777710744(同微信)

掃一掃,加微信

返回頂部

聯(lián)


撥打電話
日本精品视频在线播| 色哟哟一区二区| 精品一二区| 少妇人妻偷人精品免费视频| 麻豆一区二区三区蜜桃免费| 国产精品内射后入合集| 内射在线Chinese| 铁岭县| 阿拉尔市| 草草浮力影院| 少妇xxxx| 亚洲精品伊人| 亚洲人妻电影| 一本色道久久| 日本东京热网站| 国产一区欧美| 一级a性色生活片久久无| 另类重口bbwsexhd| 亚洲国产一区二区a毛片| 巨胸爆乳美女露双奶头挤奶| 潮喷取精10次gay在线观看| 久久精品超碰av无码| 久久综合给合久久狠狠狠97色| 亚洲国产精品高清久久久| 亚洲AV无码专区国产不卡顿 | 国产精品中文久久久久久久| 性色av无码专区一ⅴa亚洲| 芒康县| 漂亮人妻洗澡被公强 日日躁| 亚洲精品无码mⅴ在线观看| 友谊县| 激情综合色综合啪啪开心 | 91新网址| 国产精品毛片久久久久久| 国内精品久久久久影院欧美| 精品久久人人洗人人做精品日日| 国产精品18毛片一区二区| 碰超老熟女699xx| 91人妻人人澡人人爽人人精品| 苍南县| 狠狠色丁香久久综合婷婷|