Abstract: A working vehicle includes a steering device to steer a vehicle body, a working device connected to the vehicle body, an automatic steering controller to perform automatic steering of the steering device based on a difference between a scheduled traveling line and a position of the vehicle body, and a parameter changer to change a control parameter of the automatic steering depending on the working device connected to the vehicle body.

Abstract: A working vehicle includes a steering handle, a vehicle body to travel with either manual steering by the steering handle or automatic steering of the steering handle based on a traveling reference line, an operator provided to the vehicle body, and a controller to terminate the automatic steering when the operator is operated under the automatic steering.

Abstract: A novel singlet oxygen quencher is disclosed. The quencher consists of a colloidal liquid of a platinum metal group. A composition comprising, as an active ingredient, the singlet oxygen quencher is also disclosed.

Abstract: A novel singlet oxygen quencher is disclosed. The quencher comprises a colloidal liquid of a platinum metal group. A composition comprising, as an active ingredient, the singlet oxygen quencher is also disclosed.

Abstract: The present invention relates to an exposure apparatus using a projection optical system to realize a small size and the bitelecentricity as securing a wide exposure area and a large numerical aperture and to realize extremely good correction for aberrations, particularly for distortion. The projection optical system comprises a first lens group G.sub.1 with a positive refracting power, a second lens group G.sub.2 with a negative refracting power, a third lens group G.sub.3 with a positive refracting power, a fourth lens group G.sub.4 with a negative refracting power, a fifth lens group G.sub.5 with a positive refracting power, and a sixth lens group G.sub.6 with a positive refracting power in order from the side of the first object R, wherein the second lens group G.sub.2 comprises a front lens L.sub.2F with a negative refracting power, a rear lens L.sub.2R of a negative meniscus shape, and an intermediate lens group G.sub.

Abstract: The present invention relates to a both-side telecentric projection optical system and an exposure apparatus equipped with this projection optical system. In particular, the projection optical system has a structure for quite favorably correcting various kinds of aberration such as distortion in particular, while securing a relatively broad exposure area and a large numerical aperture.

Abstract: The present invention relates to an exposure apparatus using a projection optical system to realize a small size and the bitelecentricity as securing a wide exposure area and a large numerical aperture and to realize extremely good correction for aberrations, particularly for distortion.