Abstract: An electrical discharge machining electrode wire includes a core including a copper or a copper alloy, and a covering layer that covers a periphery of the core and includes a zinc. The covering layer includes an outermost layer consisting of an ?-phase of a copper-zinc based alloy. The outermost layer has a Cu concentration of 12 to 20 mass % and a variation range within 5 mass % in the Cu concentration in a longitudinal direction of the electrode wire.

Abstract: An electrical discharge machining electrode wire includes a core including a copper or a copper alloy, and a covering layer that covers a periphery of the core and includes a zinc. The covering layer includes an outermost layer consisting of an ?-phase of a copper-zinc based alloy. The outermost layer has a Vickers hardness of 200 to 300 Hv.

Abstract: An electrical discharge machining electrode wire includes a core including a copper or a copper alloy, and a covering layer covering a periphery of the core and including a zinc. The covering layer includes an inner layer including a ?-phase of copper-zinc based alloy and covering the periphery of the core, and an outer layer including an ?-phase of copper-zinc based alloy and covering a periphery of the inner layer. An x-ray diffraction intensity of (0001) of the ?-phase is more than twice an x-ray diffraction intensity of (332) of the ?-phase.

Abstract: A chemical illuminant includes an outer case comprising sealable opposite ends situated in a lengthwise direction of the outer case; one ampoule housed in the outer case; a pair of compositions that emit light when mixed with each other; and a spacer arranged in the outer case, wherein one of the compositions is contained in a space formed inside of the outer case, but outside of the ampoule, and the other of the compositions is contained in the ampoule, a space in which the one of the compositions is contained is formed between the spacer and an inner surface of the outer case, at least one recess is formed at a periphery of the spacer, and the ampoule is supported in the recess.

Abstract: An electrical discharge machining electrode wire includes a core including a copper or a copper alloy, and a covering layer that covers a periphery of the core and includes a zinc. The covering layer includes an outermost layer consisting of an ?-phase of a copper-zinc based alloy. The outermost layer has a Vickers hardness of 200 to 300 Hv.

Abstract: An electrical discharge machining electrode wire includes a core including a copper or a copper alloy, and a covering layer that covers a periphery of the core and includes a zinc. The covering layer includes an outermost layer consisting of an s-phase of a copper-zinc based alloy. The outermost layer has a Cu concentration of 12 to 20 mass % and a variation range within 5 mass % in the Cu concentration in a longitudinal direction of the electrode wire.

Abstract: A chemical illuminant includes an outer case comprising sealable opposite ends situated in a lengthwise direction of the outer case; one ampoule housed in the outer case; a pair of compositions that emit light when mixed with each other; and a spacer arranged in the outer case, wherein one of the compositions is contained in a space formed inside of the outer case, but outside of the ampoule, and the other of the compositions is contained in the ampoule, a space in which the one of the compositions is contained is formed between the spacer and an inner surface of the outer case, at least one recess is formed at a periphery of the spacer, and the ampoule is supported in the recess.

Abstract: A sheet-like wiper of a nonwoven fabric formed by entangling fibers with each other by a high-pressure water jet stream, wherein an amount of micro-matter of 100 ?m long or more falling-off therefrom is 20,000 pieces/m2 or less, an amount of material dissolved therefrom into acetone is 340 mg/kg or less, and the water absorption is 8 ml/g or more.

Abstract: A highly entertaining revolving and flying toy which is manufactured at low cost and can be seen in the dark. A revolving disk-shaped body 2 is provided with an insert pocket 2g in which chemical luminous body 3 is placed.

Abstract: A highly entertaining revolving and flying toy which is manufactured at low cost and can be seen in the dark. A revolving disk-shaped body 2 is provided with an insert pocket 2g in which chemical luminous body 3 is placed.