... hexagon bolt din933 Shanghai Pudong Development Haiyan Haiyan Metal Materials Co., Ltd. is located in the industrial city of the second ... as a whole, under the widely Metal Materials Co., Ltd., Zhejiang Import and Export Co., Ltd. deep fat. Is a life-wide, diversified, ... quality win the market and create strength, brand integrity, service weaving the future" concept, adherence to the "win-win situation. ...