Assertion: drum | /r/MadeOf | steel
Facets:
value: with a ribbed outer wall
type: OTHER
value: typically
type: DEGREE
value: to improve rigidity
type: PURPOSE
Source sentences:
text: Drums can be made of steel, dense paperboard (commonly called a fiber drum), or plastics, and are generally used for the transportation and storage of liquids and powders.
text: The drums are typically made of steel with a ribbed outer wall to improve rigidity and for rolling.