Needle is f - ns (fritsche)

摘要

F - ns is characterized in that1. by means of a compression spring " d " is prevented from opening automatically2. by pressure on " dp " of the securing pin " a " and is brought from its position by a rotation of about 75° according to – the left or right, then in position " b ", which is free of the spring pressure, the securing is in the case of open " c "3. the f - ns is either closed or open4. the press element on the securing tube " sr " also may be welded by laser