The hitch-mounted Lawn and Garden TractorATV Accessory System provides an assembly for the attachment of one or more accessories, attachments, or implements to a lawn and garden tractor andor ATV. The first etch of the two etch step process is comprised of a wet chemical etch followed by a dry etch process, both etch steps are consecutively initiated from the back of the wafer. The diffusion coefficient of the first N-type impurity is smaller than the diffusion coefficient of the second N-type impurity. under a load of 10 Kg to a melt flow rate at 190\xb0 C. When a reception request is provided from the portable telephone set 107, the xDSL home unit 60 feeds the call from the subscriber telephone set 81 via the xDSL line 72, an xDSL station side unit 104, the internet NW to the internet provider 105 for transmission of the call via the internet NW to a portable telephone radio base station 106 and also to the portable telephone set 107. In a higher load range than the partial load range, control is executed so that a fresh-air introducing valve 18 disposed in a fresh-air introduction passage of the following cylinders 2B, 2C is opened, both the burnt gas and fresh air are introduced into the following cylinders 2B, 2C, and fuel is supplied to conduct combustion in the following cylinders 2B, 2C.