Abstract: An upper cover plate for an air-tight chamber and a tool for removing the upper cover plate from the chamber are introduced. The upper cover plate integrates a chamber body to form the air-tight chamber, in which the chamber body further includes a top surface for air-tightly matching with a bottom surface of the upper cover plate. The upper cover plate further includes a plurality of thread holes engageable respectively with a plurality of the tools. The present invention is characterized on that at least one of the thread holes is formed as a through thread hole connecting to the bottom surface, and that the respective tool for engaging with the through thread hole includes a portion for penetrating the through thread hole and going beyond the bottom surface.

Abstract: A business transaction capacity management system provides an exchange for dynamically defined services to be exchanged among parties that have met standards imposed upon themselves. The system provides controls for reducing the risk of participating in a project and for limiting participation to buyers and sellers that meet criteria that are recognized in a trading community. The system facilitates the description of new goods and/or services being offered for exchange in terms developed by a trading community that are recognized in that trading community as commercially reasonable and facilitates user-defined qualifications for various limits to bring about further or different cooperation among the system's users.