In the representative embodiment of {HEAD ~ the invention} disclosed herein, a disc valve is cooperatively arranged to include a disc member of a ductile material which is transversely positioned within an enlarged chamber in the axial bore of a tubular housing and sealingly secured to {TAIL ~ the housing} 
In the representative embodiment of { HEAD ~ the invention } disclosed herein , a disc valve is cooperatively arranged to include a disc member of a ductile material which is transversely positioned within an enlarged chamber in the axial bore of a tubular housing and sealingly secured to { TAIL ~ the housing }
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