Teaching operation is performed, and from the contact position, the workpiece is ground by a given \u201ctest grinding amount. The invention allows for a welding tip to be passed through the aperture in order to weld the battery pack contacts to their corresponding metal tabs. for use in solar cells, includes the steps of preparing a suspension of semi-conducting nanometer-sized particles in a volatile suspending agent, depositing the particle suspension on a conducting substrate, removing the suspending agent by evaporation, thereby leaving a particle layer on said substrate and compressing the deposited particle layer for mechanical and electrical interconnection. Seamless integration with the federated query is provided to operate on the federated folder transparently regardless of the locality of the user or the datastores the user is searching. A swing member has a first pin pivotally mounted in the tab and a second pin under the tab and connected with the first pin by a linkage.