Abstract: A therapeutic agent may be effective for hypertrophic cardiomyopathy. The therapeutic agent may include 5-aminolevulinic acid, an ester thereof, or a salt thereof, as an active ingredient. A method for treating hypertrophic cardiomyopathy may include administering 5-aminolevulinic acid, an ester thereof, or a salt thereof in an effective dose, as may a method for improving left ventricular diastolic function in hypertrophic cardiomyopathy, and a method for improving myocardial relaxation rate in hypertrophic cardiomyopathy.

Abstract: Disclosed is a fire extinguisher (100) comprising a fire extinguisher cylinder (10) for a fire-extinguishing agent. The fire extinguisher cylinder (10) comprises a mouth portion as an opening, a shoulder, a cylindrical body portion, and a bottom portion and is shaped with use of a resin provided with no joint. In addition, the body portion in the fire extinguisher cylinder (10) has a thickness from 1 mm to 5 mm, and a crystallinity of the resin is from 13% to 30% at the sites other than the mouth portion and the bottom portion. Accordingly, the fire extinguisher (100) is lightweight and does not rust. Further, the fire extinguisher (100) has high strength or high pressure resistance.

Abstract: Disclosed is a fire extinguisher (100) comprising a fire extinguisher cylinder (10) for a fire-extinguishing agent. The fire extinguisher cylinder (10) comprises a mouth portion as an opening, a shoulder, a cylindrical body portion, and a bottom portion and is shaped with use of a resin provided with no joint. In addition, the body portion in the fire extinguisher cylinder (10) has a thickness from 1 mm to 5 mm, and a crystallinity of the resin is from 13% to 30% at the sites other than the mouth portion and the bottom portion. Accordingly, the fire extinguisher (100) is lightweight and does not rust. Further, the fire extinguisher (100) has high strength or high pressure resistance.

Abstract: A method of forcibly introducing a curved steel pipe into the ground which comprises forcibly introducing into the ground a curved steel pipe in which has been encased an auger train consisting of a plurality of augers coupled in flexible manner with universal joints by jacking said pipe from its rear, rotating said auger train within said curved steel pipe, and conveying away the excavated earth and sand through said pipe, and a curved steel pipe pressing-in machine used in the above method.