"Christopher Polhem" . . "Christopher" . . "Polhem" . "Polhem, Christopher (1661-1751)" . "1751"^^ . . "1661"^^ . _:B1c2676cfc8c3e27e0ebc27c54c74e142 . . _:B1c2676cfc8c3e27e0ebc27c54c74e142 . _:B1c2676cfc8c3e27e0ebc27c54c74e142 . _:B1c2676cfc8c3e27e0ebc27c54c74e142 "2023-05-21"^^ . _:B1c2676cfc8c3e27e0ebc27c54c74e142 . _:B1c2676cfc8c3e27e0ebc27c54c74e142 . _:B1c2676cfc8c3e27e0ebc27c54c74e142 "132082934" . _:B1c2676cfc8c3e27e0ebc27c54c74e142 . _:B1c2676cfc8c3e27e0ebc27c54c74e142 . _:B1c2676cfc8c3e27e0ebc27c54c74e142 .