| 摘要 |
An inflator for an air bag comprises, a diffuser portion having a gas discharging port and a gas discharging duct extending from the gas discharging port in an axial direction of an inflator housing, wherein the total opening area of a plurality of openings provided at distal ends of a branched portion in the gas discharging duct is larger than the opening area of an orifice portion provided inside the diffuser portion.
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