Methods The color and transparency of different concentration phantoms were observed. Properties including density, acoustic speed and acoustic attenuation of PAA gel phantom were measured.
方法观察模块浓度的不同所致颜色与透明度的变化，并对PAA模块的声学特性包括密度、声速及声衰减进行测量。
As part of the research, Phantom Works has built a scale model for wind-tunnel testing of the concept "s low-speed flying characteristics."
为配合这项研究，鬼怪工程部建立了一支尺模型风洞测试的概念车的低速飞行的特点。
As part of the research, Phantom Works has built a scale model for wind-tunnel testing of the concept "s low-speed flying characteristics."
为配合这项研究，鬼怪工程部建立了一支尺模型风洞测试的概念车的低速飞行的特点。
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