This invention provides an agricultural chemical composition comprising an enhancer for agricultural chemicals, which is excellent in stability even when compounded at high concentration, and exerts an excellent effect-enhancing action on agricultural chemicals. A blade holder longitudinally shiftable in the housing carries a blade having a cutting edge directed forward away from the rear edge. For the device having the heterojunction structure, the number of conduction carriers through a potential well and the mobility of the carriers increase to reduce an on resistance, thus increasing saturation current. The member of the attachment member is inserted into the slot of the foam insulation layer. Configuring the structure of the graph and cardinalities associated with each state allows the encoder to generate a code that conforms to defined constraints.