On December 23^rd 2013, our high sound insulation window passed test executed by The Chinese Academy of Sciences Institute of acoustics which is approved by CCS. The insulation can reach 55dB. This product will be applied to drilling platforms which require sound insulation 53dB. We are the second company that know this technology. This product is another landmark indicating we reached a higher level in development and research.

                                                       Sound-proof test(acceptance room)                                             Sound-proof test(sound source room)