技术人员使用相同的楼梯经过工作通道，到达照明台和声控室。
Technicians use the same staircase to reach the gangway leading to the lighting desk and sound controls room.
接着推荐美国宾州大学噪声控制研究室关于喷流声功率与声压级的经验公式。
Some experimental formulae about jet sound power and jet noise pressure which are contributed by the noise Control Laboratory of the Pennsylvania State University are recommended.
接着推荐美国宾州大学噪声控制研究室关于喷流声功率与声压级的经验公式。
Some experimental formulae about jet sound power and jet noise pressure which are contributed by the noise Control Laboratory of the Pennsylvania State University are recommended.
应用推荐