| 摘要 |
A base material ( 2 ) with a cooling air hole ( 1 ) is disclosed, means being present which prevent particles ( 5 ), which are located in the cooling air ( 4 ) which flows through the cooling air hole ( 1 ) during the operation of the cooling air hole ( 1 ), from closing the cooling air hole ( 1 ). In this arrangement, the means can consist in the edge of the cooling air hole ( 1 ) being uneven or having a ridge ( 3 ) or the cooling air hole ( 1 ) being star-shaped, ellipsoidal or linear or the cooling air hole ( 1 ) being circular and having lateral slots ( 7 ).
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