Mould for the manufacture of a fan having hub and a plurality of helical blades extending from the hub
作者： Terence Robert Day
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摘要: A mold for the manufacture of a fan having hub and plurality helical blades extending from hub. The cavity is designed with specific shape to produce fan. comprised two parts. At least one parts freely rotatable such that upon separation parts, formed causes part autorotate as it pulled away other part.
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