Basing on the theory of two-phase flow of gas and solid, and the characteristics of coal mine driving working face , using the discrete phase models of computational fluid mechanics to simulate the dust concentration during the ventilation process of coal drift driving with exhaust ventilation.

根據(jù)氣固兩相流理論中文字幕人妻偷伦在线视频，針對礦井掘進(jìn)工作面的特點(diǎn)老熟妇喷水一区二区三区，采用計(jì)算流體力學(xué)的離散相模型對掘進(jìn)工作面通風(fēng)過程中粉塵濃度進(jìn)行數(shù)值模擬鸥州黄色性交网占视频，總結(jié)抽出式通風(fēng)掘進(jìn)巷道中粉塵濃度的沿程分布及變化規(guī)律99久久久免费毛片。

This paper introduces several common ventilation schemes of thermal power station s main workshops, puts forward the ventilation scheme suitable for thermal power station s main workshops in cold areas, that is natural air-intake, natural+mechanical air-exhaust by roof axial fan .

本文介紹了幾種常見的火電站主廠房通風(fēng)方案，提出了適合于嚴(yán)寒地區(qū)火電站的主廠房通風(fēng)方案：即自然進(jìn)風(fēng)2021国产精品露脸在线、自然+屋頂軸流風(fēng)機(jī)機(jī)械排風(fēng)亚洲黄色视频免费。

Natural ventilation is the ventilation of a building with outside air without the use of a fan or other mechanical system.

自然通風(fēng)是不使用風(fēng)扇和其他機(jī)械系統(tǒng)進(jìn)行室內(nèi)外氣體交換的通風(fēng)方式。

Natural ventilation is the ventilation of a building with outside air without the use of a fan or other mechanical system.

自然通風(fēng)是建筑物不使用排風(fēng)扇或其他的機(jī)械系統(tǒng)而跟外面空氣流通国产精品高清无码。

Methods Twenty-four patients in postoperative cardiac surgery were randomly chosen, and investigated under three fettles:(1) The patients were sent into intensive care unit on mechanical ventilation;(2) They were all conscious and on mechanical ventilation 8 hours after operation;(3) 24 hours after operation, the patients were conscious with normal breathing.

隨機(jī)選擇心臟術(shù)后患者24例久久黄色一级A片，均在三種狀態(tài)下進(jìn)行對比研究：(1)患者術(shù)畢進(jìn)入ICU處于機(jī)械通氣狀態(tài)；(2)術(shù)后8小時(shí)處于機(jī)械通氣及清醒狀態(tài)H漫无遮挡全彩纯肉动漫；(3)術(shù)后24小時(shí)處于自主呼吸和清醒狀態(tài)精品日韩欧美一区二区久久。

Plate filter filtration efficiency of G3, the efficiency of filters, air conditioning and ventilation systems commonly used in the first level of filtering, also applies to only a filtered air-conditioning and ventilation systems.

板式過濾器的過濾效率有G3，這種效率的過濾器，常用于空調(diào)與通風(fēng)系統(tǒng)的第一級過濾人人搞人人干人人操，也適用于只需一級過濾的空調(diào)和通風(fēng)系統(tǒng)国产亚州在线观看视频。

The calculation of fire prevention is studied using fire net ventilation method in extra-long highway tunnel of Zhongnanshan Mountain where the full jet flow ventilation system is used.

采用火災(zāi)網(wǎng)絡(luò)通風(fēng)的計(jì)算方法，對秦嶺終南山特長公路隧道在全射流通風(fēng)方式下的火災(zāi)情況進(jìn)行計(jì)算研究中文字幕黄色电影免费看。

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Through the research on the fire burning in an atrium used as accoutrement mall, it is found that the impact of venting rate, make-up air inlets" positions and make-up air flux on a fire growth is comparatively great. At one time it is indicated that in the beginning phase a fire in an accoutrement mall is "linear and undulate" fire in terms of gravity ventilation. Whereas, it is "fire in terms of mechanical ventilation.

本文對用作服裝商場的中庭建筑的火源燃燒特性進(jìn)行了研究日韩爱色成人片在线观看视频网站，發(fā)現(xiàn)排煙量日韩伊人网、進(jìn)風(fēng)口位置及進(jìn)風(fēng)量大小等都對火源的發(fā)展有較大的影響；同時(shí)欧美三级电影网址，實(shí)驗(yàn)分析還表明：自然排煙條件下人人操一区，服裝商場火源在起始階段為&線性脈動(dòng)&火源；而在機(jī)械排煙條件下欧美视频性交，服裝商場火源在起始階段則為&&火源日韩在线精品色欲视频观看免费网站。

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可加工定做各種機(jī)械護(hù)罩和各種裝飾用孔板，各種型號(hào)機(jī)篩網(wǎng)国产精品资源站没想到这么骚，散熱網(wǎng)一a黄色视频a，通風(fēng)網(wǎng)，過濾網(wǎng)无码一级在线观看视频，過濾器人妻论坛，濾芯網(wǎng)，消音網(wǎng)无码A级毛片免费视，石油泥漿底網(wǎng)五月丁香六月综合，糧庫地上籠通風(fēng)網(wǎng)工程及安裝。