"Christopher Polhem" . . "Christopher" . . "Polhem" . _:B8daba83dc84cd712526fb6fcae9a7dda . "Polhem, Christopher (1661-1751)" . "1751"^^ . . "1661"^^ . . _:B8daba83dc84cd712526fb6fcae9a7dda . _:B8daba83dc84cd712526fb6fcae9a7dda . _:B8daba83dc84cd712526fb6fcae9a7dda "2023-05-21"^^ . _:B8daba83dc84cd712526fb6fcae9a7dda . _:B8daba83dc84cd712526fb6fcae9a7dda . _:B8daba83dc84cd712526fb6fcae9a7dda "132082934" . _:B8daba83dc84cd712526fb6fcae9a7dda . _:B8daba83dc84cd712526fb6fcae9a7dda . _:B8daba83dc84cd712526fb6fcae9a7dda .