2. In the production of a pigment the steps comprising adding titanium acid cake containing titanium oxide and sulphuric acid to a solution containing barium sulphide in excess of the amount required to neutralize the sulphuric acid, while rapidly agitating the solution, mixing the resultant mass with a solution of zinc sulphate, and separating the composite precipitate.
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2025-08-16 14:32
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It can be used both handheld for precision work or mounted on a stand for more controlled, larger-scale operations It can be used both handheld for precision work or mounted on a stand for more controlled, larger-scale operations
Advances in manufacturing techniques, such as casting and stamping, allowed for the mass production of drill bits with multiple cutting edges Advances in manufacturing techniques, such as casting and stamping, allowed for the mass production of drill bits with multiple cutting edges