Abstract: A precursor composition which can produce a polyimide film with excellent light transmittance, mechanical properties, coefficient of linear thermal expansion and resistance to thermal decomposition; and a polyimide film obtained from the precursor composition. The polyimide precursor composition contains a polyimide precursor with a repeating unit represented by formula (I); an imidazole compound in an amount more than 0.01 mol and 2 mol or less based on one mol of the repeating units of the polyimide precursor, and a solvent. In general formula I, 70 mol.

Abstract: An information processing device includes a processor configured to provide an incentive to a first user who sells or returns a first vehicle in which a part of a first coating film including an easily peelable layer is not peeled off.

Abstract: [Problem] To provide a fluororubber composition which (1) achieves an excellent shock absorbing property upon collision with an arm, (2) achieves non-tackiness, (3) is clean, and (4) is free of halogen substance (chlorine); and a method for producing a crosslinked fluororubber product. [Means for Solving the Problem] A fluororubber composition comprising: a polyol-crosslinkable fluororubber comprising a fluoropolymer; a polyol crosslinking agent; and a salt having BF4? as a counter ion; wherein the polyol crosslinking agent is included as an effective component in an amount of 1.25 to 3.0 parts by weight based on 100 parts by weight of the fluoropolymer; and wherein the salt having BF4? as a counter ion is included in an amount of 0.700 to 0.

Abstract: A system for braking an engine is provided with a brake drum in the form of an annular projection formed on a side of a flywheel secured to a crankshaft of the engine. A pair of brake shoes are provided inside of the brake drum, and an end of each brake shoe is rotatably supported on a supporting plate. A spring is provided between the brake shoes to contract the shoes. A cam is rotatably provided on the supporting plate to be engaged with the other end of each brake shoe. A lever is connected to the cam and a spring is provided to urge the lever in the direction to expand the brake shoes. The lever is held by a brake operating device in the contracting state of the brake shoes.