Delayed shutoff device
作者： Kenneth Stephen Ray , Guy Lewis Scribner , Payton Hurlin Scribner
DOI:
关键词:
摘要: A delayed shutoff device comprises a conduit configured to allow fluid flow through, wherein the includes start and end. The further plug be placed inside at start; move from toward end when flows through conduit; reduce upon reaching is pass-through quantity of pass while moves may form seat, being stop moving seat. fit seat imperfectly, seepage after
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