the invention of the refrigerator with self-contained unit occurred in 1923
self_contained is contained. computer_redundant_power_supply is computer_power_supply. self_powered_vehicle is self_powered_device. computer_redundant_power_supply is uninterruptible_power_supply. internal_combustion_powered_device is self_powered_device. self_powered_vehicle is consumer_durable. hp_503296_b21 is computer_redundant_power_supply. prefabricated_home is factory_built_home. on_selection is 1920_silent_film.