3a molecular sieves

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[CN] Beijing Dongfang Guansen Technology Co.,Ltd. [Manufacturer]
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Business Overview: Beijing dongfang guansen technology Co., Ltd. is a trading company which with the technology promotion and product sales. Our products are widely used in pe...

[CN] Gophin Chemical Co.,Ltd [Manufacturer]
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Business Overview: Gophin Chemical provides professional technical support and high quality chemical products. With 7 years experience in Petroleum & Chemical industry, we...