31129-31130, Teck Hughes/double drum underground air hoist
name: label: Collection Creator
content: Nordberg Manufacturing Company
setName: label: See more items in
content: Nordberg Manufacturing Company Collection
label: See more items in
content: Nordberg Manufacturing Company Collection / Series 10: Drawings
unitdate: label: Date
content: undated
container: label: Container
content: Map-folder 78
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials