Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Archaeological Ruins of Liangzhu City' has mentioned 'Slate' in the following places:
Occurrence Sentence Text Source
The inhabitants of Liangzhu sites used artifact designs of "bent knee" shaped adze handles, stone untangled adzes, art styles emphasizing the use of spirals and circles, cord-marking of pottery, pottery pedestals with cut-out decorations, baked clay spindle whorls, slate reaping knives and spear points.