The invention provides synthetic heparin-binding growth factor analogs having at least one peptide chain that binds a heparin-binding growth factor receptor, covalently bound to a hydrophobic linker, which is in turn covalently bound to a non-signaling peptide that includes a heparin-binding domain. In one embodiment, a variator is adapted to receive a control system that cooperates with a shift nut to actuate a ratio change in an IVT. The aft closure assembly includes a blast tube and closure piece that can be manufactured from a second material that does not need to be similar to nor have a coefficient of thermal expansion similar to the motor case and retaining ring piece. The sliding table has a sliding table main unit and side covers attached to respective ends of the sliding table main unit. Therefore, an adverse affect when the sensor is inserted into the body through a surgical operation can be prevented. The gas arrangement operates to pass gas to the slight space between the semiconductor wafer and the cylindrical plate, thereby contacting a lower surface of the wafer, and subsequently out of the arrangement using the pressure relief holes.