| 摘要 |
There is disclosed a piston member for a container comprised of a piston body of a diameter smaller by at least about 0.3 cm. (0.012'') than the diameter of the inner surface of the container and formed with an upwardly and outwardly extending conically-shaped wiping wall portion having a wiping edge in sliding contact with the inner surface of the container to permit flexing of the wiping edge over imperfections, such as dents or bumps in the container thereby substantially eliminating potential for piston member stall as well as more efficacious product dispensing.
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