... the Qiangtang River,Jianggan District, Hangzhou City,Zhejiang Province, Close to Hangzhou Xiaoshan International Airport and Shanghai-Hangzhou-Ningbo Expressway, with ... , which can be adjusted according to the stack length.(3)Insulation class: B, F, H, our usaual is B class(4) ... , 135oC±5oC,(6)optimum temperature: B class is -40oC to +60oC. F class: -40oC to +60oC(7)Bearing: Ball bearing (8) life time ...