| 摘要 |
The present invention provides a part having passages from an internal surface to an external surface formed by the intersection of internal and external grooves. The present invention further provides a method of providing a part having passages from an internal surface to an external surface formed by the intersection of internal and external grooves. The part includes at least one internal groove located in an internal surface and at least one external groove located in an external surface, wherein the internal groove and the external groove intersect to form at least one passage between the internal surface and the external surface.
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