A method for testing petroleum or water wells. The outer layer has a high degree of cross-linking to improve the adhesion, strength, toughness and heat resistance of the film and the inner layer has a low degree of cross-linking to improve the sealability. The sides of the head have teeth for sawing. The session support apparatus 10 acquires a set of status transition information indicating that a player of at least one of the session terminals 20 in which the detecting device has detected the performance preparatory operation has gone into the state of being able to participate in a session, and player identification information for a session terminal 20, from the session terminal 20. Hence, the air flow from the air supply to the rivet transport tube is not substantially disrupted. This photosensitive resin composition is useful for color filters and overcoating materials of LCD manufacturing processes.