These are a combination of screw terminal strips and tab multi-point connectors. The types with wire protection (additional code letters DS) reliably prevent damage to stranded conductors.
Some of the tab type multi-point connectors have pole markings.
Catalogue group D 
These are a combination of screw terminal strips and tab multi-point connectors. The types with wire protection (additional code letters DS) reliably prevent damage to stranded conductors.
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