炉床底砂

【机】 hearth-bottom sand

炉床的英语翻译：

hearth
【化】 furnace bottom; furnace hearth; hearth

底的英语翻译：

a copy kept as a record; base; bottom; end; fundus; the truth of a matter
【医】 base; basement; bases; basi-; basio-; basis; batho-; bathy-; fimdi
floor; fundus; pavimentum; solum

砂的英语翻译：

【机】 sand