Abstract: A cooling device includes a casing having a peripheral wall, a plurality of heat exchangers disposed side by side so as to extend transversely in the casing, and a plurality of fans opposed to the plurality of heat exchangers. The casing has a plurality of baffles that extend from the heat exchanger group side toward the cooling fan group side in a space surrounded by the peripheral wall and is arrayed in an arrangement direction of the plurality of heat exchanges. A one side end portion of each baffle is positioned on a boundary between two mutually adjacent heat exchangers or on one of the heat exchangers. The fifth fan is disposed at such a position as to be opposed to one of the plurality of baffles, and other fans are disposed at a position between the peripheral wall and a baffle or between the plurality of baffles.

Abstract: A construction machine includes a centrifugal fan, and a bell mouth arranged on the suction side of the centrifugal fan. The centrifugal fan has a rotatable hub, an annular shroud arranged so as to face the hub and having a suction port, and multiple blades provided between the hub and the shroud. An outlet of the bell mouth is arranged on the radially inner side of the suction port of the shroud. Each blade is formed such that: a leading edge has a convex shape protruding toward a suction surface relative to a line segment linking a connection of the leading edge with the hub and a connection of the leading edge with the shroud; and a vertex of the convex shape of the leading edge is positioned on a radially inner side of a wall surface of the outlet of the bell mouth when the suction side of the centrifugal fan is seen in an axis direction.

Abstract: A construction machine includes a centrifugal fan, and a bell mouth arranged on the suction side of the centrifugal fan. The centrifugal fan has a rotatable hub, an annular shroud arranged so as to face the hub and having a suction port, and multiple blades provided between the hub and the shroud. An outlet of the bell mouth is arranged on the radially inner side of the suction port of the shroud. Each blade is formed such that: a leading edge has a convex shape protruding toward a suction surface relative to a line segment linking a connection of the leading edge with the hub and a connection of the leading edge with the shroud; and a vertex of the convex shape of the leading edge is positioned on a radially inner side of a wall surface of the outlet of the bell mouth when the suction side of the centrifugal fan is seen in an axis direction.

Abstract: 1-Phenylethyl sulfone derivatives substituted by a halogenated alkyloxy group is represented by the general formula ##STR1## where R is an alkyl group substituted by a halogen atom, n is 1 or 2, each of P and Q is a hydrogen atom or a lower alkyl group and each of X and Y is a hydrogen atom, a lower alkyl group or a halogen atom. The compounds are effective as a herbicide. Also disclosed is a process for their preparation.

Abstract: Novel N-containing heterocyclic ring-substituted O-arylphosphate derivatives, the preparation thereof and insecticides acaricides and nematicides containing said derivatives are provided. The O-arylphosphate derivatives have the general formula: ##STR1## wherein A is --CH or nitrogen, X is hydrogen, a halogen or trifluoromethyl; Y is oxygen, S(O)n (wherein n is an integer of from 0 to 2) or NR.sup.2 (wherein R.sup.2 is hydrogen or a lower alkyl); Z is oxygen or sulfur; R and R.sup.1 independently are a lower alkoxy or lower alkylthiol; and B is hydrogen, a halogen or a lower alkyl. The O-arylphosphate derivatives have an excellent insecticidal acaricidal and nematocidal action.

Abstract: An aniline derivative represented by the formula (I): ##STR1## wherein A denotes CH or nitrogen atom; B denotes oxygen atom or sulfur atom; X.sup.1 and X.sup.2, independently of each other, denote hydrogen atom, halogen atom, trifluoromethyl group or nitro group; Y and Z, independently of each other, denote hydrogen atom or halogen atom, and a process for producing the same.