totraumfrei (latest) free of dead zones, no or (free of) hard-to-clean 'dead pockets' (inaccessible/restricted device areas such as nooks and crannies), free of dead pockets, without dead pockets, no internal dead pockets, free of pockets

totraumfrei: This refers to pipework that has no dead zones, i.e. it has no hard-to-clean ‘dead pockets’ (inaccessible/restricted device areas such as nooks and crannies).

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