There will be no damage to the stone after long use. It will not influence the air conductivity of the stone and will not change the natural color and luster of the stone.
长时间使用，保护石材不受损坏，不影响石材的透气性，不改变石材的天然泽。
The problem is the low thermal conductivity of air.
问题在于空气的热导率很低。
PTT knitted fabrics comfort properties of air permeability, moisture permeability and moisture conductivity were tested and evaluated.
对PTT针织面料的透气性、透湿性及导湿性等舒适性能进行了测试与评价。
When the thermal conductivity of insulation layer is lower than that of air, its performance is better than that of micro bridge structure.
当复合热释电薄膜红外探测器中绝热层的热导率低于空气的热导率时，它的绝热性能优于微桥结构。
Copper is the best conductor of heat, having about 7 times the conducting power of iron, while iron conducts 100 times as well as water, and water has 25 times the conductivity of air.
铜是最好的热传导体，其导热能力约为铁的7倍，铁的导热能力是水的100倍，而水的导热能力是空气的25倍。
Further along, the influence of harmonic wave of magnetic conductivity of air gap and saturation of motor on wave pattern of wind electric current of micro-step driving was analyzed.
进而分析了气隙磁导谐波及电机饱和对微步驱动电流波形的影响。
The doping time and concentration of dopant affect conductivity I2-doped PTV film has good air stability in six months.
PTV膜具有较好的力学性能、I＿2掺杂PTV膜导电率有极好的空气稳定性。
The heat conductivity, thermal capacity, pressure and resistance of water are bigger than those of the air, so a person loses more body heat in water and consumes more energy than on land.
水的导热性和热容量、压力和阻力都比空气大，人在水中体热散发相对多一些，能量消耗也大于陆上活动。
Microporous insulation products actually have thermal conductivity values lower than still air, due to their ability to block the three modes of heat transfer (conduction, convection and radiation).
微孔绝缘材料的热导值低于静态气流，这是由于该产品能阻碍热传递的三种方式的实现(热传导、对流和辐射)。
Effects of the geometric structure and thermal conductivity of the louvered fins on heat transfer and air flow friction in the radiators are evaluated in virtue of the computation program.
运用所编程序分析了散热器结构参数与材质对散热器流动阻力与散热性能的影响。
The preparing technique of doped silica aerogels was introduced in this paper. The relationships between its thermal conductivity and air pressure, temperature have been investigated.
介绍了新型掺杂改性气凝胶的制备工艺以及其导热系数与气压、温度的关系。
The obtained wall material has the characteristics of big air porosity, small heat conductivity and high compression strength, and realizes the light heat insulation of the wall material.
所制得的墙体材料具有气孔率大，导热 系数小，耐压强度高的特点，实现了墙体材料的轻质隔热化。
The obtained wall material has the characteristics of big air porosity, small heat conductivity and high compression strength, and realizes the light heat insulation of the wall material.
所制得的墙体材料具有气孔率大，导热 系数小，耐压强度高的特点，实现了墙体材料的轻质隔热化。
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