板振动对微穿孔板吸声体的 声学 特性存在一定的影响.The panel resonance always affects the absorption characteristics of microperforated - panel ( MPP ) absorber.试验表明,微穿孔板吸声结构可有效地降低排气噪声.Results show that the acoustic system of micro perforation p...
Major Cities: Madrid, Barcelona, Valencia, Sevilla, Zaragoza, Malaga, Bilbao, Las Palmas, Valladolid.主要城市: 马德里, 巴塞罗纳, 巴伦西亚, 塞维利亚, 萨拉戈萨, 马拉加, 毕尔巴鄂, 拉斯帕尔马斯, 巴利阿多利德.Chelsea appear to be closing on the capture of Athletic Bi...
她捧起疏松的泥土，任其缓缓地从指间漏下。She gathered loose soil and let it filter slowly through her fingers.阳光从房上漏下.The sunlight drips over the house.柔和的阳光从房上漏下.Soft sunlight are dripping over the house....
The resonance scattering spectra of colibacillus have been studied.研究了大肠杆菌的共振散射光谱.The relative molecular mass of chitosan fractionated by wave was measured by the light scattering method.采用粘度法分析了不同溶剂对壳聚糖粘度的影响,用光散射法测定了超声波...
将军把部队埋伏在浓密的树林里.The general ambushed his troops in the dense woods.我方战士埋伏在丛林中等待敌人.Our soldiers lay in ambush in the jungle for the enemy.谋杀者埋伏在树后.The murderers lurked behind the trees....