Abstract: The present disclosure is an optical line test system that detects a distribution of loss points of an optical line in a longitudinal direction, using a coherent light measurement device, applies vibration to facility disposed on a path of the optical line, detects a vibration point of the optical line in a longitudinal direction upon applying the vibration, using the coherent light measurement device, and identifies the loss point based on correspondence between the detected loss point and vibration point.

Abstract: The present invention is a grease composition, comprising a fluorine-based grease, a urea-based grease and a soap-based grease (a calcium complex soap thickener, a calcium soap thickener, a barium soap thickener, a magnesium soap thickener or a sodium soap thickener), and a rolling bearing in which the grease composition is filled.

Abstract: A grease composition according to an embodiment includes a base oil, a thickener and 0.5% by weight or more of a dispersing agent, the dispersing agent including at least one of a carboxylic acid metal salt, a metal salt of a polycarboxylic acid and a copolymer of a carboxylic acid metal salt and a hydrocarbon compound.

Abstract: The invention provides a grease composition having (A) a lithium soap thickener, (B) as a base oil an ester type synthetic oil obtainable from an esterification reaction of trimethylolpropane with a fatty acid, and (C) (c-1) a 1-naphthylamine type antioxidant and (c-2) a diphenylamine type antioxidant, wherein the contents of (c-1) and (c-2) are 1.0 to 10 mass % in total, based on the total mass of the composition, and the ratio by mass of (c-1) to (c-2) is in the range from 30:70 to 70:30.

Abstract: An inverted vehicle travels while maintaining an inverted state. The inverted vehicle includes specifying means for specifying a position at a predetermined distance from a step portion which a rider gets on or off, when the rider gets on or off the vehicle. The specifying means may project a predetermined shape onto the position at the predetermined distance from the step portion, or may cause a vehicle member to move to the position at the predetermined distance from the step portion. The inverted vehicle may further include position detecting means for detecting a position of a foot of the rider, and contact determining means for determining whether the foot is to contact the vehicle, based on the position of the foot detected by the position detecting means.

Abstract: An inverted vehicle travels while maintaining an inverted state. The inverted vehicle includes specifying means for specifying a position at a predetermined distance from a step portion which a rider gets on or off, when the rider gets on or off the vehicle. The specifying means may project a predetermined shape onto the position at the predetermined distance from the step portion, or may cause a vehicle member to move to the position at the predetermined distance from the step portion. The inverted vehicle may further include position detecting means for detecting a position of a foot of the rider, and contact determining means for determining whether the foot is to contact the vehicle, based on the position of the foot detected by the position detecting means.

Abstract: A rolling bearing is provided. The rolling bearing includes an inner ring, an outer ring, a plurality of rolling elements disposed in a space between the inner ring and the outer ring, and a grease composition enclosed in the space. The grease composition including (A) a lithium soap thickener, (B) a base oil which is an ester synthetic oil obtained by an esterification reaction of trimethylolpropane with a fatty acid; and (C) (c-1) a 1-naphthylamine antioxidant and (c-2) a diphenylamine antioxidant, a total amount of (c-1) and (c-2) ranging from 1.0 to 10 mass % based on an entire amount of the grease composition, and a blending ratio of (c-1) and (c-2) ranging from 30:70 to 70:30 in terms of mass ratio.

Abstract: The invention provides a grease composition having (A) a lithium soap thickener, (B) as a base oil an ester type synthetic oil obtainable from an esterification reaction of trimethylolpropane with a fatty acid, and (C) (c-1) a 1-naphthylamine type antioxidant and (c-2) a diphenylamine type antioxidant, wherein the contents of (c-1) and (c-2) are 1.0 to 10 mass% in total, based on the total mass of the composition, and the ratio by mass of (c-1) to (c-2) is in the range from 30:70 to 70:30.