An apparatus for performing key control includes an integrated circuit arranged to detect a key press according to some inputoutput signals of a key matrix, where the inputoutput signals include first inputoutput signals corresponding to a first direction and second inputoutput signals corresponding to a second direction. The first half of the test fixture is a wafer cavity plate for receiving the wafer, and the second half establishes electrical communication between the wafer and electrical test equipment. The reaction and removal of sulfur from the crude may be facilitated by contacting the crude oil with a catalytic material in the presence of a stripping fluid. The LFA is further adapted to greatly reduce the frictional force between a load and a work surface thereby allowing low surface stress on a work surface combined with ease of movement. In addition, an intermediary device may receive the callee identity and specify services available during the call according to the callee identity. The pivoting portion is disposed inside the pivot hole structure, so that the supporting arm is rotatably disposed inside the accommodating slot structure.