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The product is the necessary equipment for controlling well kicks and implementing pressure control technology for oil & gas well. When wellhead is fully closed by blind gate valve, heavy mud is forced into the wellbore through well killing manifolds to implement kill job; when well blowout occurs, water is forcefully injected to prevent fire; when well had been fired, inactivator is forcefully injected into wellbore to assist putting out the fire. This product is designed and manufactured according to API Spec 6A standard and various valve groups are produced with erosion resistance, excellent sealing performance and high reliability.