Accumulated dirt and sludge can be removed by "blowing down" through the drain in the bottom of trap.

there he stood on the old landing ， with the autumn wind blowing down upon him through the trap-door.

他站在寒冷的楼梯上；秋风从阁楼的圆窗吹进来。

Autumn winds are blowing down

一阵阵秋风呼啸而过

Violent thunderstorms cut a swath of destruction through the area, blowing down trees and damaging houses.

剧烈的风暴摧毁整个地区，掀翻了树木和房屋。

Trees have fallen, limbs are blowing down and debris is scattering the roads.

树被刮倒，树枝也被刮落，路上到处都是残瓦碎片。

A warm dry wind blowing down the E slopes of the Rockies.

吹过洛矶山脉东坡的暖而干的风。

So, in the summer breeze blowing down, you give me a ring grass.

于是，在那年夏天的微风吹拂下，你编了一个草戒指给我。

Investigation on NC Machining Method of Spiral Slots in Mould Core for Blowing Thin Plastic Film

薄膜吹塑模芯螺旋槽的数控加工

Now the non-contact handing technologies having been adopted are mainly electromagnetic, ultrasonic, air suspension, etc. The air suspension technology is divided into two types: blowing and negative pressure adsorption.

目前非接触搬运技术主要有电磁式、超声波式和空气悬浮式等几种方式。

Steam blowing for supercritical pressure boilers by using pressure-reducing method

超临界锅炉不熄火降压法蒸汽吹洗

The TSA technique generally consists of adsorption, pressure reducing, heating, cold blowing, pressure increasing and adsorption, which are periodically circulated.

TSA的工艺过程一般分为：吸附→卸压→加热→冷吹→升压→吸附，周期性循环。

The simulation result predicted a reasonable thickness profile of the final bottle comparing with the experiment. Also, the effect of stretch process and blowing pressure on the thickness profile of bottle was investigated numerically.

通过计算值与实验值的对比，表明模拟能够较好地预测成型瓶子的厚度分布，并研究了拉伸速率、吹胀压力等工艺参数对瓶子厚度分布的影响。

Sometimes the oxygen and steam in high-pressure blowing pressure, the gas furnace calorific value of the higher income.

有时将氧气和蒸气在高压下吹入加压炉中，则所得煤气的热值更高。

In this paper, the characteristics of TBM combined blowing technology in steelmaking plant of Meis-han has been introduced. And the influence of operation in medium phosphorous hot metal, metal charge consumption, converter lining after using this technology.

介绍TBM顶底复吹技术特征，在梅山炼钢厂应用时，以及运用该技术对冶炼中磷铁水操作、钢铁料消耗及炉衬的影响，通过使用TBM技术有效的改善了梅山的脱磷。

This article discusses some technical issues about design and operation of blowing air recovery plant.

对吹风气回收装置设计的一些技术问题提出了看法。

This paper involves the research of the application of shaft blowing and exhausting longitudinal ventilation on-line control method.

本文建立了公路隧道竖井送排式纵向通风神经网络在线控制系统的一般方法。

Optimized model of air supply outlet angle in highway tunnel blowing and exhausting longitudinal ventilation system

抽风机排出口调节门公路隧道竖井送排式通风送风口角度优化模型

Notion of Variable Air Volume System A Dynamic Managing Mode for Blowing Rate in Local Ventilation

变风量空调系统探讨局部通风风量动态管理

Trends A Dynamic Managing Mode for Blowing Rate in Local Ventilation

局部通风风量动态管理

Abstract: A paint vapour treatment by means of blowing and drawing ventilation in an airtight workroom is suggested in the article. Optimal ventilating parameters of push-pull flow dust control in large spaces

文摘：提出在密闭喷漆作业间，采用吹吸式通风法对作业间的漆雾进行治理的方案。吹吸气流控制大空间粉尘最佳通风参数的研究

A paint vapour treatment by means of blowing and drawing ventilation in an airtight workroom is suggested in the article.

提出在密闭喷漆作业间，采用吹吸式通风法对作业间的漆雾进行治理的方案。