undercast air bridge

Research on application of downward ventilation to coal mining face in horizontal seam with coal outburst in potential;

近水平突出煤层回采工作面下行通风应用研究

Field experiments using downward ventilation were studied and the gas emission and distribution laws at the goaf working face were discussed.

结果表明,在采用下行通风后,采空区绝对瓦斯涌出量为上行风时的80%,工作面φ(CH4)下降了75%,瓦斯不再超限。

This paper discussed methane emission,the reasons for methane reduction in up corner,problems should be considered in the condition of change from normal ventilation into downriver ventilation.

对下行通风时瓦斯涌出及下隅角瓦斯减少的原因进行论证,对上行风改为下行风应注意的问题进行了论证。

In order to find more effective control measurements for declensional ventilation mine fire,the catastrophe potential function of airflow reversal in a declensional ventilated mine fire was deduced by using catastrophe theory,which indicates the airflow reversing process has discontinuous characteristics.

为了寻求下行风流火灾的有效控制途径,应用突变理论推导了下行通风主干风路风流逆转的突变势函数,揭示出其逆转过程具有突变特征,分析了下行风流逆转具有的突跳、分叉、不可达、滞后、多模态等多种非线性特征,实验验证了下行风流逆转的突变过程。

Delivery of catalyst particles by a screw feeder at the inlet of a downer in a hot model was studied, and the effects of pressure difference, downward wind, temperature on feeding rate were investigated.

将螺杆式进料器应用于下行床热态小试实验装置的入口进行催化剂的输送,考察了出入口压差、下行风量、温度等因素对输送速率的影响。

The authors elaborate the application of longwall mining with descentional ventilation at 7327 working face in the medium-thickness seam with big dip-angle,and point out the ways of fire prevention by giving even air pressure,burying pipe and gelatinizing,and using atomizing inhibitor.

论述沛城煤矿7327回采工作面大倾角中厚煤层下行通风长壁开采,采用均压、埋管注胶、雾化阻化剂等防灭火措施及效果,提出了采煤工作面大倾角中厚煤层长壁开采的防灭火方法。

On Fire Precaution Called Downwards Ventilation Used in the Combined Coal Face;

沿空掘巷综采工作面下行通风防灭火预防

vent shaft [Mass Transit Railway]

通风塔〔地下铁路〕

The Analysis of the Circulates Mode of Ventilation System in the Case of Fire of Subway;

火灾情况下地铁通风系统运行模式分析

A Study on Behavior Evolution of Travelers With Different Risk-taking Under ATIS

交通信息作用下不同风险属性出行者的行为演进

To Study on Internet Banking risk Management Puzzledom and Its Countermeasures under the Conditions of China--To Take the Bank of Communication as an Example

中国背景下网上银行风险管理的困境及对策研究——以交通银行为例

downcast and uptake ventilator

下向和上向通风筒吸排气两用通风机

Established exposure limits, use local exhaust ventilation.

接触：如果在不够通风的条件下处理，需要采用一定的通风设备进行处理。

Turn the electric fan on and make a draft.

打开电扇通一下风。

Your quotation is on C.I.F. Basis. What risks are you usually covered against?

你报的是到岸价,那么通常情况下你方对什么风险进行投保?

Application of Ventilated Shaft in Ventilation System of Urban Traffic Link Tunnel

通风竖井在地下联系通道通风系统中的应用

By determining the ventilation resistance of the mine shaft ventilation system, it is found that the ventilation resistance in return airways is particularly large and the ventilation degree is middle.

通过对矿井通风系统进行通风阻力测定,发现矿井回风段通风阻力过大且通风难易程度为中等。

Through analyse on cooling path of motor, distribution of wind scalar, wind speed and pressure difference of a motor operating at the ratings is obtained.

通过对电机冷却风道进行分析研究,得到电机在额定工况下,电机内部风量分布、速值和压差。

Jet Ventilation for Super-long Tunnels and Ventilation Technology for Tunnels with Multiple Working Faces;

特长隧道射流通风与多作业面条件下通风技术

Air Quantity Calculation for the Reformation Design of Underground Ventilation System in Zhaotong Lead & Zinc Mine

昭通市铅锌矿井下通风系统改造设计风量计算

Ventilation is carried out according to the minimum air volume in the specifications.

并按说明书中的最低通风量进行通风换气。

Introdction on the Design of Ventilation and Moisture Remoual of the Bank Issuing Storeroom(National treasury);

银行发行库房(金库)通风除湿设计简介

Our captain ordered us to square away and sail before the wind.

我们的船长下令调整风帆，顺风行驶。

Bear away: To alter course away from the wind.

航向下风：远离风向改变航行路线。