Abstract: Carbon black in which an oil absorption amount is 150 mL/100 g or more and 400 mL/100 g or less and a cobalt content that is measured by induced coupled plasma-mass spectrometry is 20 ppb or less.

Abstract: A multilayer coil component includes an element body, a plurality of coil conductors, a first resistive layer, and a second resistive layer. The plurality of coil conductors are disposed in the element body and electrically connected to each other. The plurality of coil conductors include a first coil conductor and a second coil conductor adjacent to each other. The first resistive layer and the second resistive layer oppose each other between the first coil conductor and the second coil conductor. The first resistive layer is in contact with the first coil conductor.

Abstract: Carbon black in which an oil absorption amount is 150 mL/100 g or more and 400 mL/100 g or less and a nickel content that is measured by induced coupled plasma-mass spectrometry is 50 ppb or less.

Abstract: Carbon black in which an oil absorption amount is 150 mL/100 g or more and 400 mL/100 g or less and an iron content that is measured by induced coupled plasma-mass spectrometry is 500 ppb or less.

Abstract: A coupled structure with high separation strength and a window regulator. A lift arm (5) is provided with a tapered through-hole (35) provided with a first inner wall portion (33) work-hardened due to plastic deformation and a swell portion (45) having an inner wall surface (41) continuing to an inner wall surface (31) of the tapered through-hole (35) and provided with a second inner wall portion (43) work-hardened due to plastic deformation. A driven gear (3) is provided with a protrusion (51) fit in from the tapered through-hole (35) to the swell portion (45), provided with an outer wall portion (53) work-hardened due to plastic deformation, and having an outer wall surface (55) in close contact with the inner wall surface (31) of the tapered through-hole (35) and at least a part of the inner wall surface (41) of the swell portion (45).

Abstract: A coupled structure with high separation strength and a window regulator. A lift arm (5) is provided with a tapered through-hole (35) provided with a first inner wall portion (33) work-hardened due to plastic deformation and a swell portion (45) having an inner wall surface (41) continuing to an inner wall surface (31) of the tapered through-hole (35) and provided with a second inner wall portion (43) work-hardened due to plastic deformation. A driven gear (3) is provided with a protrusion (51) fit in from the tapered through-hole (35) to the swell portion (45), provided with an outer wall portion (53) work-hardened due to plastic deformation, and having an outer wall surface (55) in close contact with the inner wall surface (31) of the tapered through-hole (35) and at least a part of the inner wall surface (41) of the swell portion (45).

Abstract: A rail grinding apparatus for railroad rails has a grinding belt wrapped around motor-driven pulleys which are rotatably mounted on a frame. The frame is supported on the surface of a rail by rollers which bear the weight of the grinding apparatus. A noise guard surrounds the grinding belt to reduce noise.