... roast twice deliery time 15days warranty 2years after installationZhejiang Rongrong Industrial Co., Ltd. is a professional manufacturer in the design, development, ... in 2007, located in Wuyi of Zhejiang Province. Rongrong company covers 500.000 square meters with 400 more employees, ... in 2007, located in Wuyi of Zhejiang Province. Rongrong company covers 500.000 square meters with 400 more employees, ...