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- The radar battle still rages today with the development of Stealth bombers, which avoid detection due to a radar absorbent surface and by bouncing radar beams off at angles. 隨著隱形轟炸機的發展,雷達戰時至今日仍然十分盛行,這都是由於雷達表面的吸收劑能夠在某一角度彈回波信號。
- The results showed that : The number of secondary roots、the dry weight、the absorbent surface total area and activ absorption area 、activity of TTC was different in various degrees of water deficit. 結果表明:水分脅迫顯著影響水稻單株次生根數、根系乾重、根系吸收總面積、活躍吸收面積和根系活力;
- The two rooms both adopted American Milliken carpet and high-class beech surface sound absorbing wall, which can ensure the comfort and privacy of the meeting. 兩處會場均選用了美國Milliken地毯和高檔楓木飾面吸音牆面,可保證會談的舒適及私密。
- Behavior of Underwater Sound Absorbent Rubber 水下吸聲橡膠的性能研究
- A new type of porous sound absorbing material was made from super-strength gypsum and glass fiber. 摘要以高強石膏為膠凝材料,內摻玻璃纖維,製備出一種新型多孔吸聲材料。
- a roller that has an absorbent surface used for spreading paint 用於擴散塗料的具有吸收性表面的圓筒
- A new sound absorbing foamed compound mainly made from PVC resin,EPR and rockwool has been investigated by foaming process. 以PVC樹脂、EPR和岩棉為主要原材料用發泡方法製成了一種中低頻吸聲性能優良的新型泡沫吸聲材料。
- The influence of the diameter of the absorber, wind speed and the emissivity of the absorber surface on the equilibrium temperature have been discussed. 討論了吸收器直徑、風速和吸收表面發射率對平衡溫度的影響。
- 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和無機物等研製了一種性能優良的吸聲材料。
- Since plant root shape is very not reg ulation, it is very difficult for plant study worker to measure plant root, espe cially to measure absorbing surface area of plant root. 但植物根的形狀很不規則,對其形狀的幾何測量對植物研究工作者來說,一直是一件十分困難的工作,特別是根吸收表面積的測量。
- Features : good abrasion resistance, ventilation, permeability, water preservation, heat insulation, sound absorbency and stability. 特點:良好的耐磨性、通風、透氣性、防水、隔熱、吸音和高穩定性。
- a roller that has an absorbent surface used for spreading paint. 用於擴散塗料的具有吸收性表面的圓筒。
- Thecapability of preventing burning, self-extinguishing, heat-insulation , smoke suppressing, sound absorbing and shockproof.. 具有阻燃、自熄、隔熱、消煙、吸音、抗震等性能。
- 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水泥和膨脹珍珠岩為主要原料,輔之以分散性良好的增強劑聚丙烯纖維,研製出一種新型吸聲材料。
- This compound materials used in absorbing material is with sound absorbing function and light quality, wide band, good compatibility and strong inoxidizability. 這種複合材料用於吸波材料,它不僅具備良好的吸波功能,還兼備質量輕、寬頻帶、兼容性好和耐腐蝕性強等優點。
- The acoustical properties of compound impedance in a double layer sound absorbing structure is studied,Base on that,A model is constructed to optimize the double layer structure. 研究了由穿孔板及吸聲材料構成的雙層阻抗複合吸聲結構,在此基礎上建立了其聲學性能模型,並通過建立優化數字模型,對其結構的各個幾何參數和物理參數進行了優化設計。
- Sound Absorbent Material Made from Waste of Polished Brick 拋光磚廢料製備吸音材料
- A sound mind is inseparable from a sound body. 健全的精神是與健康的身體是不可分割的。
- Alarmed at the first sound, we hit the dirt. 第一聲警報一響我們就迅速卧倒。
- He has told a story which sound not objective. 他講了聽起來不真實的一個故事。