Obstructions

• At the power house the canal is furnished with a gate, and with cribs to keep back the obstructions, such as sticks. 威廉·亨利·杜利特. 世纪发明.
• Hooker was off bright and early, with no obstructions in his front but distance and the destruction above named. 尤利西斯·格兰特. U．S．格兰特的个人回忆录.

克莱夫整理