Abstract: A body unit of a grass cutter incorporates a deceleration mechanism unit. The deceleration mechanism unit has a ring gear-side member, a sun gear-side member, a retainer board member, and a small gear. Eleven rollers mounted on the retainer board member are each provided in a gap between a ring gear-side guide and a sun gear-side guide, and engagement portions of the rollers are in contact with both the ring gear-side guide and the sun gear-side guide. The small gear engages with both a ring gear and a sun gear.

Abstract: A body unit of a grass cutter incorporates a deceleration mechanism unit. The deceleration mechanism unit has a ring gear-side member, a sun gear-side member, a retainer board member, and a small gear. Eleven rollers mounted on the retainer board member are each provided in a gap between a ring gear-side guide and a sun gear-side guide, and engagement portions of the rollers are in contact with both the ring gear-side guide and the sun gear-side guide. The small gear engages with both a ring gear and a sun gear.

Abstract: A grass mower includes an operation division housing a disc-shaped rotary cutter, a motor division, a power-source division accommodating a battery. The operating lever is divided into a front lever and a rear lever, wherein the motor division is located in the middle of the mower so as to secure a well balanced weight.

Abstract: A molding resin composition comprising [A] 100 parts by weight of a vinyl chloride resin, [B] 30-110 parts by weight of a graft copolymer wherein 90-50 parts by weight of a monomer mixture consisting of 10-40% by weight of an alkenyl aromatic compound, 20-50% by weight of an alkenyl cyanide compound and 20-50% by weight of a methacrylate is graft-copolymerized on 10-50 parts by weight of polybutadiene or a rubbery copolymer of 60% by weight or more of butadiene and a vinyl monomer copolymerizable therewith (the amount of toluene-insoluble fraction is preferably 50% by weight or less), the degree of grafting being 30-110% and the acetone-soluble fraction of the graft copolymer having an intrinsic viscosity of 0.4-1.5 dl/g as measured in methyl ethyl ketone at 30.degree. C., [C] 3-50 parts by weight of a rubbery acrylonitrile-butadiene copolymer and [D] 15-100 parts by weight of a plasticizer for vinyl chloride resins.