Automatic vs. thermal Expansion Valves
name: label: Collection Engineer
content: Allen, E. Lewis
setName: label: See more items in
content: E. Lewis Allen Papers
unitdate: label: Date
content: 1931-1932
container: label: Container
content: Box 2, Folder 13
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials