| 摘要 |
<p>A low-profile port closure apparatus which consists of a port positioned on the vessel to be sealed, a threaded low-profile sealing plug for effecting fluidtight closing of the port, a pressure-retaining manifold structure which enables sealing, positioning, and removal of the plug in the port by manipulation with a rotatable stem extending from engagement with the plug through a seal to the exterior to the manifold, the manifold being removable from operative position.</p> |
