GMCC Hosts R290 Seminar at IIR Gustav Lorentzen Conference 2014-10-12 The 11th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2014) was held from September 1 to 2, 2014 at Shangri-La Hotel Hangzhou in China.online viagraonline viagra To view the complete content, please log in. SIGN IN Back