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The metal ring gasket is made of metal material composed of forging and heat treatment and machining into a cross-sectional shape of the metal gasket BX entity type
According to the prescribed bolt's performance grade above 8.8 level, it is called high strength bolt
The whole centralizer has no welding knot, no rivets and strong structure.
It is used to prevent the casing bottom from touching or inserting the shaft wall and guiding the casing to bottom to the bottom of the well.
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