尤物视频污,99热99热99超碰,精品久久久久女少妇,少妇精品无码,日B视屏久久香色,亚洲美女午夜福利av,国产美女被操,国产九九精品,国产久久色情

Shanghai Tongya Chemical Technology Development Co., Ltd. (formerly Shanghai Tongya Fine Chemical Factory) is located in Zhuhang Town, Jinshan, Shanghai, with very convenient transportation and unique geographical advantages. It covers an area of 1,500 square meters, with a factory building area of 1,200 square meters and fixed assets of 500,000 yuan.

The factory was established in February 1992, mainly producing chemical reagents, light magnesium oxide, anhydrous magnesium sulfate, magnesium sulfate, magnesium acetate, magnesium chloride, calcium sulfate, calcium carbonate, calcium nitrate, etc. Our factory has strong technical capabilities, excellent equipment, advanced processes, comprehensive testing methods, and rigorous quality management. Through ten years of production experience, we have formed a complete quality assurance system.

Now that China has joined the WTO, under the new circumstances, our company will adhere to the guiding principle of "building on trust, treating others with sincerity, seeking stability and practicality, and achieving common development." We will continue to maintain close cooperative relationships with both new and old customers at home and abroad, moving forward together towards a new starting line.