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eCl@ss eCl@ss Version 11.0 (en)
Classification: 22-30-90-90 Stair construction (building element, other, unspecified) [BAB771012]
Preferred name: Stair construction (building element, other, unspecified)
Definition: Sub-group (4th level) for objects that cannot be classified into other specified sub-groups in the existing structure, but that are classified to their parent-class on the 3rd level
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