A bifurcated connection portion is formed on one of an upper rotating body and a boom foot, a flat plate connection portion inserted into the bifurcated connection portion is formed on the other, and pin holes are provided in both the connection portions. The friction tab is provided with an outer coating of a substantially soft, resilient and pliant material generally a soft, non-skid material, e. The plasma reformer may produce a gas stream from the liquid feed. The heat-transferring device further includes first and second conductive members that are each configured and arranged to thermally couple each flexible member end to one of the heat producing device and the heat sink.