A multilayer pipe which comprises at least an inner layer and an outer layer. In particular, a controller selectively controls a first clutch disposed between the engine and the motorgenerator and a second clutch disposed between the motorgenerator and a drive wheel to switch between an electric drive mode in which the first clutch is released and the second clutch is engaged, and a hybrid drive mode in which both the first and second clutches are engaged. A head member is configured to mechanically engage with and electrically connect to a battery unit and also mechanically disengage and electrically disconnect from the battery unit by manually grasping and applying mechanical force to the elongate handle. The stand may include a package portion having compartments for holding various components, such as components of a bone cement preparation kit. Build data may be used to construct the structure one block at a time, or in batches of blocks. Consequently, production yields can be improved.