Tool / E1. Shapes of hand drills for stone | Stonewall's / Stone masonry / Natursteinmauerwerk

E1. Shapes of hand drills for stone

WZ_Bohrer

Geometry of hand drills for stone drilling work:

Quelle: Die Bauweise mit Naturstein, Adolf Stoller,1949

WZ_Stollerbohrer

Geometry of hand drills for stone drilling work:

Quelle: Die Bauweise mit Naturstein, Adolf Stoller,1949

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