horseshoe on the opening of verrastbaren galleries

摘要

horseshoe(1) r & t.; rthe equestrian with several holes (2, 3, 4, 5) to startof verrastbaren passages (6), characterised by the fact that the drilling(2) on the underside (7) of the horseshoe (1) a correspondingthe passages (6) trained rastabsatz (8) smaller diameterwith a depth of 3 & ndash; 5 mmto exhibit.