Transverse air hole has pipe-shaped head piece with blow-in hole at circumference, where pipe-shaped end piece is provided with multiple gripping holes at circumference

摘要

The transverse air hole has a pipe-shaped head piece (11) with a blow-in hole (12) at the circumference. A pipe-shaped end piece (13) is provided with multiple gripping holes (14) at the circumference. The end piece is assembled with the head piece in a detachable manner and is twistable in assembled condition opposite to the head piece.