Iso Class 8,Diy Iso Clean Room,Clean Room Hepa Filters,Clean Room Classification Dongguan V1 Environmental Technology Co., Ltd. , https://www.v1airpurifier.com â– The 17th China Welding Expo, originally scheduled for May 20-23, 2003, was postponed to September. â– The 6th Asia-Pacific International Rubber and Plastics Industry Exhibition, scheduled to be held on July 8-11, 2003, was postponed until December 2nd and 5th, 2003. â– "2003 China International Bearing and Special Equipment Exhibition, General Parts Exhibition" originally scheduled to be held in Shanghai on June 3, 2003