英文英文字典
英文英文字典
古腾堡计划中的在线英语-英语词典
结果
Barker's mill的结果
Barker's mill
A machine, invented in the 17th century, worked by a
form of reaction wheel. The water flows into a vertical tube and gushes
from apertures in hollow horizontal arms, causing the machine to
revolve on its axis.