Lock (water navigation)

Canal lock and lock-keeper's cottage on the Aylesbury Arm of the Grand Union Canal at Marsworth in Hertfordshire, England

Lock on the River Neckar at Heidelberg in Germany

Three gorges dam lock near Yichang on Yangtze river, China

A pound lock on the Keitele-Päijänne Canal at Äänekoski in Central Finland

A lock is a device used for raising and lowering boats, ships and other watercraft between stretches of water of different levels on river and canal waterways. The distinguishing feature of a lock is a fixed chamber in which the water level can be varied; whereas in a caisson lock, a boat lift, or on a canal inclined plane, it is the chamber itself (usually then called a caisson) that rises and falls.

单词	Staircase lock
释义	Staircase lock 原声例句海底两万里-Twenty Thousand Leagues Under The Sea Man uses his right hand more often than his left, and consequently his various instruments and equipment (staircases, locks, watch springs, etc.) are designed to be used in a right–to–left manner. 人类使用右手的频率多于左手，因此他的各种仪器和设备（楼梯、锁、手表弹簧等）被设计为以从右到左的方式使用。英语百科 Lock (water navigation) A lock is a device used for raising and lowering boats, ships and other watercraft between stretches of water of different levels on river and canal waterways. The distinguishing feature of a lock is a fixed chamber in which the water level can be varied; whereas in a caisson lock, a boat lift, or on a canal inclined plane, it is the chamber itself (usually then called a caisson) that rises and falls.
随便看	indigeneities的意思 indigen的意思 indigen的意思 indigene的意思 indigeneship的意思 Indigenisation的意思 indigenisations的意思 Indigenise的意思 indigenised的意思 indigenises的意思 indigenising的意思 indigen的意思 Indigenismo的意思 Indigenist的意思 indigenista的意思 indigenital的意思 indigen的意思 indigenization的意思 indigen的意思 indigenize的意思 indigen的意思 indigen的意思 indigen的意思 indigenous的意思 indigenous alveolar bone的意思

Staircase lock

Lock (water navigation)