Lead Sulfate Tribasic is a white or slightly yellow powder. Slightly sweet and toxic. Density 7.1, melting point 820℃, starts to lose crystal water above 200℃, refractive index 2.1. insoluble in water and organic solvents, soluble in hot ammonium acetate and alkali, as well as nitric acid and hot concentrated hydrochloric acid. It is non-flammable and corrosive, easily absorbs moisture and decomposes when exposed to sunlight in a humid state.
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Shenzhen Ship Telephone Company won the "open door" in foreign trade
From January to February 2012, Shenzhen Ship Special Telephone Technology Co., Ltd. won a good start in the foreign trade, and won new orders for wireless emergency calls in the United States, France, Germany, Israel, Sweden, Finland and other countries, most of which are wireless. 3G technology, 3G technology has been in front of some European and American competitors, like the United States and Sweden, Finland's counterparts they do not have such a phone call, they are from 2G, 2.5G, 3G, all mass production.