275- Coal Hogs Work Safe
подкаст
Подкаст: 99% Invisible
Язык: Русский
Возрастное ограничение: 12
Длительность: 19 минут 24 секунды
Последнее обновление:
Добавлен:
Coal miner stickers started out as little advertisements that the manufacturers of mining equipment handed out. Even before the late 1960s, when mining safety laws started requiring reflective materials underground,