This is the ventilation shaft through which air leaves a mine.

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A ventilation shaft through which air enters a mine .

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Ventilation shaft through which air leaves a mine .

煤礦上用來排除空氣的一個坑道3yz14.com。

Hence, based on deep analysis and research, the new type gas treatment series facilities are developed, which are composed of multiple bunker gas separators, Foehn wind ventilation shaft, universal wind deflector, brattice and two-way air regulator. As a result, a new way of gas treatment has been developed for the coal preparation plant.

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This text introduces the application of theodolite in the direction al measure technique in Qidong ventilation shaft.

簡要介紹了陀螺經(jīng)緯儀在定向測量中的應(yīng)用和祁東風(fēng)井聯(lián)系測量技術(shù)99re视频在线蜜。

Broad ventilation shaft is arranged inside the barebone so the heating processor does not contaminate othermachine parts.

廣闊的通風(fēng)豎井內(nèi)安排準(zhǔn)系統(tǒng)等加熱處理器不污染其他零件黄色视频99精品视黄色小说频。

No.2 ventilation shaft of Qinling highway tunnel is one of the largest ventilation shafts in the highway tunnel field at home and abroad.

秦嶺公路隧道2號通風(fēng)豎井，為國內(nèi)乃至世界公路隧道規(guī)模最大的豎井工程亚洲欧美日韩中文视频在线观看。

Brennan, Booth, and Zack rappel down a ventilation shaft leading to a tunnel beneath Washington DC.

Brennan日本女性WWWCOm、Booth及Zack深入首都華盛頓已棄用的地下水道調(diào)查一宗謀殺案件。

Brennan and Booth stumble upon a subterranean world of homeless people when they find the remains of a filmmaker in the ventilation shaft of an underground tunnel.

Brennan和Booth偶然發(fā)現(xiàn)了一個聚集無家可歸之人的地下城市可以进去的黄片，他們找到一個制片人在通風(fēng)豎井的地下隧道的殘骸亚洲zaixianguankan。

The paper gives a detailed introduction to the numerical value analysis for natural smoke evacuation under the condition of fire,and provide scientific basis for the application of natural smoke evacuation in metro section tunnel,the arrangement of ventilation shaft and the section tunnel structure choice.

成都地鐵一號線南部淺埋區(qū)間隧道在國內(nèi)首次采用自然通風(fēng)模式，本文對其在火災(zāi)工況下自然排煙模式的數(shù)值模擬分析作了詳細介紹欧美老妇与小伙子性生交，為自然排煙方式在地鐵區(qū)間隧道的應(yīng)用欧美色精品视频免费，以及通風(fēng)豎井的布置和區(qū)間隧道結(jié)構(gòu)形式的選擇提供了科學(xué)的依據(jù)。