Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Complex of Koguryo Tombs' has mentioned 'Engineering' in the following places:
Occurrence Sentence Text Source
The tombs themselves reflect ingenious engineering capabilities.
The technology employed represented a unique, creative and long-sought engineering solution to the technical problems posed by underground tomb construction.
Criterion (i): The wall paintings of the Koguryo tombs are masterpieces of the culture and period of the Koguryo kingdom; the construction of the tombs demonstrates ingenious engineering solutions.