Three magnetic field generating coils on the distal end side of the shape detection probe are provided in the curvable portion, and the first coil at the leading end position is placed at the position corresponding to the leading end curvable piece, whereas the third coil at the position corresponding to the trailing end curvable piece. In the aforesaid oral care instrument, which comprises a handle, a head and a neck, a channel for supplying oral-care composition running within the neck to a nozzle of the head via the handle, is formed; and the head is connected in a detachable manner to the neck. Those strains that grow in media containing the first resistance marker are further transformed using a vector comprising a second selection marker gene and the alkaline phosphatase gene. A separate stud marking guide extends perpendicularly from the elongated rail. Thus, it is also possible to replay with ease each of the pieces of music with a desired tempo according to the reproduction list PL1 and the specified BPMs. The presence of trouble in pressure sensors is determined according to whether or not gas pressure values detected by the pressure sensors fitted to branch pipes is within an allowable range when stop valves fitted to the branch pipes connected to the access ports of hydrogen absorbing alloy tanks are fully opened from their fully closed state.