... , no broken, attractive and durable. ( adopting aluminum fan blade in the past, which had some problems caused by ... emphasis efficiently; France imported axletree(bearings), high intensity, low noise, long service life. 4. Variety sizes of shape ... tester, to smooth operating, reduce noise, enhance stability, extend service life.36’’Fan Air capacity20800m3/HrSize1000×1000×450mmNoise<64DBPower0 ...