Qingdao Duratight Sealing Product Co., Ltd.  
Located in Qingdao City of Zhejiang Province, Qingdao Duratight is a professional and reliable manufacturer of graphite related products. All kinds of products are extensively applied in those industrial fields ...

Sinopec Qingjiang Petrochemical Co., Ltd.  
Sinopec Qingjiang Petrochemical Co., Ltd. is a large scale state owned petrochemicals enterprise with a history of more than 40 years. Our company has made enormous contributions to the national ...