厚颜无耻韩国动漫在线阅读视频,艳妇厨房激情,一女三黑人玩4P惨叫A片,性生大片免费观看668

產(chǎn)品列表PRODUCTS LIST

首頁 > 測試服務(wù) > TC3000 Thermal Conductivity
TC3000 Thermal Conductivity
點擊次數(shù):2236 更新時間:2014-09-01

 

Thermal conductivity measuring methods can be divided into steady-state method and non-steady-state method by macroscopic mechanism of thermal conductivity. 

Steady-state method requires long period ,and there are also many other factors which affect measuring accuracy. However, non-steady-state method has the advantage of short measuring time, high accuracy and low requirements for operational environment. Especially, the transient hot-wire method has been considered internationally as the best measuring method of thermal conductivity in the research area of thermal conductivity.

 

Measuring Principle

The origin of hot-wire method could be traced back to the year 1780 when an American scientistJoseph Priestley made the first experiment about heat transfer ability of air. In 1931,Stâlhane and Pyk, who are the first to adopt transient hot-wire method in measuring the thermal conductivity of solid, powder and liquid,  Hot-wire method is now widely used in gas, liquid, solid, metal fusion and so on. 

 
阿尔山市| 沂源县| 绥棱县| 江津市| 广河县| 邓州市| 平定县| 大方县| 来安县| 措勤县| 深圳市| 旅游| 湘潭市| 时尚| 获嘉县| 武清区| 秭归县| 长沙市| 松潘县| 长宁县| 延边| 娱乐| 庄浪县| 工布江达县| 砚山县| 阜宁县| 松江区| 安庆市| 娄烦县| 紫云| 佛冈县| 漳州市| 襄汾县| 普定县| 泰安市| 马公市| 汝南县| 康马县| 武清区| 大田县| 祁连县|