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Ball valves have been widely used in various industries and have developed into a major valve category. Ball valves have been widely used in various industries and have developed into a major valve category. Ball valves have been widely used in various industries and have developed into a major valve category. Ball valves have been widely used in various industries and have developed into a major valve category. Ball valves have been widely used in various industries and have developed into a major valve category. Ball valves have been widely used in various industries and have developed into a major valve category. Ball valves have been widely used in various industries and have developed into a major valve category. Ball valves have been widely used in various industries and have developed into a major valve category. Ball valves have been widely used in various industries and have developed into a major valve category. Ball valves have been widely used in various industries and have developed into a major valve category. Ball valves have been widely used in various industries and have developed into a major valve category. Ball valves have been widely used in various industries and have developed into a major valve category. Ball valves have been widely used in various industries and have developed into a major valve category. Ball valves have been widely used in various industries and have developed into a major valve category. Ball valves have been widely used in various industries and have developed into a major valve category.