In this paper, the performance of sound absorption is improved through the structure-integration realizing by the special design of the mold and concrete board and inherent cavity resonance sound absorbing property of expanded perlite. 通过对上述各种吸声结构的综合运用,并充分利用膨胀珍珠岩本身固有的空腔共振吸声特性,辅助提高吸声性能。
A kind of mold used in refrigerator vaporizing board flipping is introduced, it states mold structure, working process and design key points, the structural form is provided out. 介绍一种用于冰箱蒸发板贴胶的模具,对其模具结构,工作过程和设计的要点给予阐述,给出实用的结构形式。
The finite element method and CAD in the design of large al die casting mold& board 大型铝压铸模板设计中的有限元法与CAD
The success of Cr-Zr-Cu mold copper board not only can save us lost of money, but also it has significant meaning to improve the continuous equipment and technology to our country. 铬锆铜结晶器铜板研制成功,不仅每年可为宝钢节约大量费用,而且对提高我国的连铸技术及装备水平有重大意义。