A semiconductor device includes a semiconductor element including a first element portion having a first gate and a second element portion having a second gate, wherein the turning on and off of the first and second element portions are controlled by a signal from the first and second gates respectively. In vivo, ex vivo and in vitro regeneration and de novo formation of articular cartilage and collagen by intermittently applied hydrostatic pressure. At least one of the key and the cylinder is capable of generating a signal when the key is electrically connected with the cylinder. The operating section further includes a curved lower lid contacting area and at least one notch for contacting a rim on a container and providing a pivot point. Support rails are mounted to the base member, and wedge-shaped supports are mounted to the support rails.