Attachment devices are described for attaching and locating overlapped anchor sheets while allowing for some relative movement as to expansion and contraction. While the air temperature sensor is self-heated during an electrical current supplying time period by the pulse signal, it is cooled during an electrical current halting time period. The judging device acquires \u201can imbalance judging parameter\u201d which increases with \u201cthe increase of the difference between the amount of hydrogen contained in the exhaust gas before the exhaust gas passes through the catalyst and that after the exhaust gas passes through the catalyst\u201d according to the sub-feedback amount. As the plunger is moved during delivery, features on the plunger and features connected to the barrel interact to provide for intermittent stops to the injection process.