A gripper, in particular a pneumatically actuated gripper, with a housing, in which a preferably pneumatically actuable linear drive is formed. A catalyst for production of a polyester, characterized by comprising at least a Group 4A compound ), a compound of at least one element selected from the group consisting of magnesium, calcium and zinc ) and an oxygen-containing organic solvent. According to the present invention, communication interference caused by unnecessary electromagnetic waves generated in the electronic device, electric wave of other devices and an external electric wave can be reduced, thereby mitigating the loss of lives and property damage resulting from incorrect operations. The valve body is movable between an on position and an off position whereby water from the primary chamber is directed to a secondary outlet when the valve is in the on position for feeding water to the secondary water spray nozzle or nozzles. The server identifies the plurality of resources using rules of linked data. A transaction model can represent a transaction as device independent configuration information.