A non-volatile semiconductor storage device includes device regions and device isolation regions that are formed on a semiconductor substrate, with a first direction defined as their longitudinal direction. The discharge judgment is performed continuously a plurality of times for the nozzle that is an inspection target. A reciprocal trigger operates an air pump to deliver heated lotion from the tube to one of the interchangeable heads. To that end, a formula for calculating the flow rate of a gas is theoretically derived that flows with a pressure ratio not higher than the critical pressure ratio. The composite spring and the metal spring engage with each other in an engagement part formed in at least one position between the curved parts and the end parts.