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- air flow resistance and dirt 污阻
- Air flow in industrial process always generates vortexes,which not only increase flow resistance and consume much energy,but also destroy the equipment. 物料加工中的气流循环过程常伴有涡流出现,涡流会增大气流流动阻力,消耗风机能量,对设备和管道也有破坏作用,有必要采取导流措施对气流进行合理组织。
- Standard Test Methods for Water Vapor Diffusion Resistance and Air Flow Resistance of Clothing Materials Using the Dynamic Moisture Permeation Cell 用动力湿气渗入单元测定衣服材料的水蒸气扩散阻力和空气流动阻力的测试方法
- The air is loaded with smoke and dirt. 空气里弥漫着烟雾和尘埃。
- Little flow resistance and corrosiveness of media.It has double flow direction and is widely applied. 液体阻力小,介质冲蚀小,具有双流向适用范围广。
- Part of bio-enzyme adsorbed on the surface alters the wettability of rock(turn oil wet to water wet), decreases oil flow resistance and increases oil's flow properties. 部分生物酶吸附在岩石颗粒表面，改变岩石的润湿性（由油湿改为水湿），降低原油流动阻力，增加原油的流动性；
- Fabricating filter medium by LIGA can improve its mechanical intensity and performances, reduce its flow resistance and enhance its regeneration capability. 将LIGA技术的这些优点充分用于过滤介质的制作中,能改善过滤介质的力学强度、机械性能、流阻大小、可再生性等过滤性能。
- Remove dust and dirt by high-pressure air before paint application. 用高压空气吹扫除去灰尘等污物。
- Unlike depth-bed filtration media, MWC media utilize surface filtration principle, thus much lower flow resistance and significantly higher permeability. 用这种材料制成的各种过滤芯可以通过常规的清洗方法进行充分的清洗，从而可以反复使用。
- Dust and dirt soon accumulate if a house is not clean regularly. 房屋不经常打扫，尘土很快就越积越多。
- Dust and dirt soon accumulate if a house is not cleaned regularly. 房屋不经常打扫，尘土很快就越积越多。
- Which is conducive to air flow and circulation. 有利於大气的流通扩散。
- They also cannot pollute the air with clouds of smoke and dirt. 它们也不能用成团的烟尘污染空气。
- An experimental study using artificial roughness selected to simulate Acorus calamus L, and four densities, has been conducted to investigate its influence on the flow resistance and structure. 试验中，研究了菖蒲的四种分布密度对水流的阻力和水流结构的影响。
- Experimental investigation of flow resistance and beat transfer characteristics has been carried out on a typical lamilloy model whose ratio of inlet bole, pin fin, and outlet hole is 1: 4: 1. 摘要对进气孔、扰流柱和出气孔个数之比为1:4:1的典型层板冷却结构的流体流阻与换热特性进行了实验研究。
- His hands were begrimed with oil and dirt. 他的手被油和污物弄脏。
- His clothes are begrimed with oil and dirt. 他的衣服被油污弄脏了。
- Relationships of air flow, draw resistance and length of cigarettes 烟支内气流流量、吸阻与烟支长度的关系
- They panned off the sand and dirt . 他们用淘金盘淘去砂泥。
- The bottom of the body designed no concave nest. So have lower flowing resistance and prevent valves leakage or damage from trash pipe up. 阀体底部设计无凹槽，因此具有流阻小，防止污物堆积造成阀门渗漏或损坏等特点。
