Henan malpractice Construction Engineering Testing Co., Ltd. is a professional testing company, is one of the qualification place in Henan Province since the first detection through examination of business. Business in the Pile qualification qualification, the qualification grade steel, a qualified indoor environment, building energy efficiency testing, subject testing, materials testing, curtain detection, detection of roads and bridges, air defense projects to detect a number of test qualification and testing laboratories. The volume of material in its natural state refers to a material solids and pore volume occupied (with open pores and closed pores) and volume. Regular shape to the material, the volume can be measured directly calculated, for irregularly shaped materials, after the surface with wax seal, measure the volume by drainage method. When the pores within the material contains water Zhumadian indoor environment testing, its quality and volume have been changed, and therefore the determination of the apparent density of the material shall indicate their water situation. Water situation does not indicate an apparent density, apparent density refers to dry. Henan malpractice Construction Engineering Testing Co., Ltd. is a professional indoor environment testing testing company in Xuchang, Henan Province is one of the detection business since the first through the examination of the qualification place. Business in the Pile qualification qualification, the qualification grade steel, a qualified indoor environment, building energy efficiency testing, subject testing, materials testing Luohe indoor environment testing, curtain detection, detection of roads and bridges, air defense projects to detect a number of test qualification and testing Lab. Hardness refers to the degree of hard material surface is resistant to other objects carved, pressed into the surface of its capabilities. Keys of the molecular bonds of the material and its hardness is related generally larger covalent bond, an ionic bond and certain metal-bonded material hardness. Hardness greater wear resistance is higher, but difficult to process. In engineering, often using the relationship between hardness and strength of materials, indirect test material strength. Environmental testing, environmental malpractice detected by the indoor environment testing Zhoukou of Henan Construction Engineering Testing Co. malpractice. Environmental testing, environmental malpractice testing, indoor environment testing Zhoukou of Henan malpractice Construction Engineering Testing Co., Ltd. (www.hnrsjc.cn) (www.rsgcjc.com) this year introduced a new upgrade, the above picture is for reference only, please call Tel This page or image on to obtain the latest information, contact: Wang Wei.