查询词典 downward ventilation

In comparison with bugle shaped nozzle, bifurcated nozzle downward jet angle 45°, cow-nose nozzle and three-hole nozzle, in all, the last two are better than the former and bifurcated nozzle downward jet angle 45 is better than bugle shaped nozzle; Cow-nose nozzle is helpful for guaranteeing the product's quality, in order to protect jet flow from eroding the strand at narrow face, gain uniform temperature distribution at cross section and decrease heat flux, adding the block's width to 100 mm. Three-hole nozzle is advantageous to increase flux and casting speed, but should avoid weak shell thickness in the center broad. In the real production, setting the SEN's immersed depth or plugging the hole at the bottom can adjust the flow and temperature distribution in the mold.

对比喇叭形水口，双侧孔水口(45°)，牛鼻子水口和三孔水口，总的说来后两者优于前两者；而双侧孔水口(45°)又优于喇叭形水口；牛鼻子水口和三孔水口比较各有特点，前者对保证铸坯质量有利，为防止流股对窄面的冲击，增加挡块宽度到100 mm，可使结晶器横截面上温度分布更加均匀，降低窄面热负荷；后者对增加流量，提高拉速非常有利，但要防止中孔射流过强导致铸坯中心坯壳变薄，在实际生产中可通过控制水口浸入深度或塞住浸入式水口的底孔来调节结晶器中的流动与温度分布状态。

In comparison with bugle shaped nozzle, bifurcated nozzle downward jet angle 45°, cow-nose nozzle and three-hole nozzle, in all, the last two are better than the former and bifurcated nozzle downward jet angle 45 is better than bugle shaped nozzle; Cow-nose nozzle is helpful for guaranteeing the product"s quality, in order to protect jet flow from eroding the strand at narrow face, gain uniform temperature distribution at cross section and decrease heat flux, adding the block"s width to 100 mm. Three-hole nozzle is advantageous to increase flux and casting speed, but should avoid weak shell thickness in the center broad. In the real production, setting the SENs immersed depth or plugging the hole at the bottom can adjust the flow and temperature distribution in the mold.

对比喇叭形水口，双侧孔水口(45°)，牛鼻子水口和三孔水口，总的说来后两者优于前两者；而双侧孔水口(45°)又优于喇叭形水口；牛鼻子水口和三孔水口比较各有特点，前者对保证铸坯质量有利，为防止流股对窄面的冲击，增加挡块宽度到100 mm，可使结晶器横截面上温度分布更加均匀，降低窄面热负荷；后者对增加流量，提高拉速非常有利，但要防止中孔射流过强导致铸坯中心坯壳变薄，在实际生产中可通过控制水口浸入深度或塞住浸入式水口的底孔来调节结晶器中的流动与温度分布状态。

Jilin Province : 20 years male and female students, height, weight, brassieres recorded strong growth trend; FVC level showing a clear downward trend; endurance and flexibility quality shows a downward trend.

20年间吉林省农村：男、女学生身高、体重、胸围均呈现增长趋势；肺活量水平呈现明显下降趋势；耐力和柔韧素质呈现明显的下降趋势。

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

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。

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.

本文对用作服装商场的中庭建筑的火源燃烧特性进行了研究，发现排烟量、进风口位置及进风量大小等都对火源的发展有较大的影响；同时，实验分析还表明：自然排烟条件下，服装商场火源在起始阶段为"线性脉动"火源；而在机械排烟条件下，服装商场火源在起始阶段则为""火源。

Presents the considerations in selection of fire dampers of ventilation system for underground garage,ventilation system for rooms with gas fire units,pressurization air supply system, smoke exhaust system in corridor,and air conditioning systems.

介绍了地下车库通风系统、需设气体灭火装置房间的通风系统、加压送风及走廊排烟系统、空调系统防火阀的选定。

In the method, a optimization model of a ventilating network is put forward by taking the minimizing squared sum of algebraic sum of the ventilation pressure of all branches in a independent circuit about all independent circuits as object function, therefore a new algorithm of ventilation network optimization is obtained.

该方法通过使所有独立回路分支风压代数和的平方和最小化的方法，建立了通风网络解算优化模型，并用梯度法对该模型进行解算，获得了一种新的风网解算算法。

In the method, a optimization model of a ventilating network is put forward by taking the minimizing squared sum of algebraic sum of the ventilation pressure of all branches in a independent circuit shoot all independent circuits as object function, therefore a new algorithm of ventilation network optimization is obtained.

该方法通过使所有独立回路分支风压代数和的平方和最小化的方法，建立了通风网络解算优化模型，并用梯度法对该模型进行解算，获得了一种新的风网解算算法。

Ventilation : It is very important for the safety of the applicator good Ventilation be provided to all portions of the area.

通风作业区的各个部位保持良好的通风对操作人员的安全是非常重要的。

Ventilation It is very important for the safety of the applicator that good ventilation be provided to all portions of the area.

通风 作业区的各个部位保持良好的通风对操作人员的安全是非常重要的。

But this is impossible, as long as it is engaging in a market economy, there are risks in any operation.

但是，这是不可能的，只要是搞市场经济，是有风险的任何行动。

We're on the same wavelength.

我们是同道中人。