The present invention provides a carriage to transport a ladle and to transfer molten metal into equipment for pouring whereby the investment cost can be reduced by having the equipment made compact, and the temperature of the molten metal can be maintained high, and the cycle time can be reduced, because the time to transport the molten metal can be less. The first arm is formed by a gate nanotube fastened at its base end to the holder, and its tip end protrudes from the holder. In the opened position, the shielding flap is held by the carrier, which allows the taser withdrawing from the storage compartment efficiently. A second reference time at which the input signal has a discrete value within an inversion section is set. Also provided is a method of detecting a neoplastic cell in a sample.