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- metro sound absorbed material 地铁吸声材料
- A new type of porous sound absorbing material was made from super-strength gypsum and glass fiber. 摘要以高强石膏为胶凝材料，内掺玻璃纤维，制备出一种新型多孔吸声材料。
- A new sound absorbing material that is good in sound absorbing at the low frequency and high frequency is made from PVC and rockwool in this paper. 利用PVC和无机物等研制了一种性能优良的吸声材料。
- A new type of sound absorbing material was made from super-strength gypsum and glass fiber and the sound absorp-tion coefficient of the material was tested by standing wave tube method. 以高强石膏为主要原料,内掺玻璃纤维,在发泡剂的作用下,制备出一种新型多孔吸声材料,采用驻波管法测试材料的吸声系数。
- This compound materials used in absorbing material is with sound absorbing function and light quality, wide band, good compatibility and strong inoxidizability. 这种复合材料用于吸波材料，它不仅具备良好的吸波功能，还兼备质量轻、宽频带、兼容性好和耐腐蚀性强等优点。
- A new cement was prepared which consisted of the composite porous sound absorbing material with portland cement, expanded perlite, ceramsite as main raw materials and some supplementary substances. 摘要以普通硅酸盐水泥、膨胀珍珠岩、陶粒主要原料，加以一定的辅助材料，研制出一种新型水泥基复合多孔吸声材料。
- A new type of sound absorbing materials mainly made from low alkaline cement and expanding pearlite has been investigated on the basis of sound absorption principle. 摘要以低?A水泥和膨胀珍珠岩为主要原料，辅之以分散性良好的增强剂聚丙烯纤维，研制出一种新型吸声材料。
- Sound Absorbent Material Made from Waste of Polished Brick 抛光砖废料制备吸音材料
- RESEARCH ON FOAMED PVC-COMPOUND SOUND ABSORBING MATERIAL 聚氯乙烯基混合吸声材料的研究
- effective porosity of sound absorbing materials 有效空隙率
- To soak up or dry with absorbent material. 吸收，吸掉用可吸收物质吸干或吸掉
- Influence of the Structural Form of Sound Absorbing Material on the Behavior of Sound Absorption 吸声材料构造形式对吸声效果的影响
- Standard Specification for Fibrous Glass Duct Lining Insulation (Thermal and Sound Absorbing Material) 绝热和隔音材料(玻璃纤维,管道衬里材料)
- Modeling and numerical study on a new type of composite sound absorbent material 一种新型复合材料吸声的理论建模与仿真
- Equivalent Specific Acoustic Resistance of Sound Absorbing Materials 吸声材料的当量声阻率
- It presents the idea of using RAC and describes the methods of using Radar Absorb Material (RAM) and special conductive material to reduce the Radar Cross Section (RCS) of aircraft. 该方法可减少雷达吸波材料的使用量,从而减轻飞行器重量,提高其性能,降低成本,改善维修性。
- sound absorbing material 吸声材料
- noise absorbent material of metro 地铁吸音材料
- So absorbed was he that we didn't dare to make a sound. 他是那样全神贯注，我们都不敢出声了。
- Without adequate markets to absorb materials collected for recycling,throwaways actually depress prices for used materials. 缺少适当市场吸收回收的物品，丢弃物实际上压低了回收物的价格。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
