PDF(132 KB)
JQF型低噪声局部隔声罩风笛装置研究设计
张新华;宋雷鸣;田新浩
PDF(132 KB)
PDF(132 KB)
JQF型低噪声局部隔声罩风笛装置研究设计
Research and Design of JQF Low-Noise Air Horn Device with Partial Acoustical Enclosure
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