Abstract: A control method for a fuel cell system, the fuel cell system including a hydrogen storage part and a fuel cell stack that generates electric power using hydrogen supplied from the hydrogen storage part, the fuel cell system being mounted on a towed portion of a moving body that includes the towed portion and a towing portion, the fuel cell system being electrically connected to the towing portion, the towing portion including a battery and a drive device performing driving in response to supply of electric power, the towed portion being towed by the towing portion, the control method includes: acquiring remaining amount information indicating a remaining amount of the battery, and starting supply of electric power to the towing portion when it is determined that the remaining amount of the battery is equal to or less than a threshold based on the remaining amount information.

Abstract: A problem solved is realizing a self-sharpening of a rotary grindstone in the most efficient manner and allowing sequential appearances of sharp cutting faces. To solve the problem, the invention provides a manufacturing method of a rotary grindstone 1 with one or more sheets of glass cloth 4 as a reinforcing material, wherein the glass cloth 4 is weaved by thirl plain weave/twill weave or leno weave composed of twist yarns having a diameter of 0.1 mm or less and formed in meshes with lengthwise and crosswise lengths of 2.0 mm or less, and attaching liquid resin to the glass cloth 4 to produce a prepreg 6, attaching resin-coat abrasive grains to both faces of the prepreg 6, and pressing the prepreg 6 in a press machine and further performing predetermined press working in a metal mold, performing baking.

Abstract: A problem solved is realizing a self-sharpening of a rotary grindstone in the most efficient manner and allowing sequential appearances of sharp cutting faces. To solve the problem, the invention provides a manufacturing method of a rotary grindstone 1 with one or more sheets of glass cloth 4 as a reinforcing material, wherein the glass cloth 4 is weaved by thirl plain weave/twill weave or leno weave composed of twist yarns having a diameter of 0.1 mm or less and formed in meshes with lengthwise and crosswise lengths of 2.0 mm or less, and attaching liquid resin to the glass cloth 4 to produce a prepreg 6, attaching resin-coat abrasive grains to both faces of the prepreg 6, and pressing the prepreg 6 in a press machine and further performing predetermined press working in a metal mold, performing baking.

Abstract: In a method of manufacturing a revolving whetstone comprising a central portion in which a whetstone center hole into which a whetstone driving shaft of a grinder is inserted is arranged and a disk-shaped whetstone body that has an effective whetstone circular portion arranged in the circumferential outside of the central portion as one body, the wall thickness of the central portion is formed thinner than the wall thickness of the effective whetstone circular portion, and a whetstone material for the thinned wall thickness of the central portion is put on the wall thickness surface of the effective whetstone circular portion, and the wall thickness of the effective whetstone circular portion is formed thicker than the wall thickness of the central portion.

Abstract: In a method of manufacturing a revolving whetstone comprising a central portion in which a whetstone center hole into which a whetstone driving shaft of a grinder is inserted is arranged and a disk-shaped whetstone body that has an effective whetstone circular portion arranged in the circumferential outside of the central portion as one body, the wall thickness of the central portion is formed thinner than the wall thickness of the effective whetstone circular portion, and a whetstone material for the thinned wall thickness of the central portion is put on the wall thickness surface of the effective whetstone circular portion, and the wall thickness of the effective whetstone circular portion is formed thicker than the wall thickness of the central portion.