Abstract: A work machine comprises a main body, a cab riser, and a shaft. The cab riser includes a cab and a frame, the cab being uprightly positioned on the work machine in a first position, and being tilted forward in a second position, and the frame comprising a first plate to contact a second plate provided on the main body in the first position. The cab riser is rotatable about the shaft in clockwise and counterclockwise directions to and from the first position and the second position. The first plate and the second plate can be clamped together by a clamping assembly in the first position, the clamping assembly including one or more clamps to clamp the first plate and the second plate, and the clamping assembly is mounted on the main body.

Abstract: An acquisition unit acquires network topology information indicating a connection form of a network device and traffic information data that is information about flows in traffic. A path calculation unit calculates a path of each flow so that the number of flows whose paths are to be changed is minimized.

Abstract: An air conditioner includes: a stepped portion provided on a side of an outlet of an air passage wall; an air passage extension having a rotary shaft in the outlet, the air passage extension being rotatable in an opening direction about the rotary shaft to bring a rear end into abutment with the stepped portion in such a manner that the air passage extension integrates with the air passage wall to form a curved surface of a predetermined curvature; and a rotary mechanism configured to cause the air passage extension to rotate in such a manner as to bring the rear end into abutment with the stepped portion when the air conditioner is put into operation.