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2009

◆2009年7月,正升参加IRF国际学术交流会、国际噪声控制工程大会,从而拉开了正升与国际交流合作的序幕。

◆2009年8月,组织召开了“09西部首届交通噪声控制技术交流会”,开始搭建国内行业交流平台。

 

Year 2009
◆ In July 2009, ZISEN participated in IRF international academic exchange conference and international noise control engineering conference, which debuted that ZISEN established the exchange and cooperation relationship with international partners. 
◆ In August 2009, ZISEN organized and convened “09 First Session of West China Traffic Noise Control Technology Exchange Conference”, and began to establish an industrial exchange platform in China.