| 摘要 |
A vessel includes a cylindrical section, a bottom section, a flange, and a shoulder between the flange and the bottom section. The shoulder extends from an outside vessel surface and is concentric with an inside vessel surface relative to a central axis of the vessel. The vessel may be mounted at a dissolution test apparatus by inserting the vessel in an aperture such that the shoulder abuts an inside edge defining the vessel plate. The concentric shoulder enables the vessel to be centered in the aperture, or relative to an instrument inserted in the vessel along the central axis.
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