A lock is a device for raising and lowering boats between stretches of water of different levels on river and canal waterways. The distinguishing feature of a lock is a fixed chamber whose 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. Locks are used to make a river more easily navigable or to allow a canal to take a reasonably direct line across country that is not level.
Engaged in manufacturing and exports of building material such as brass building material, brass hinges, brass tower bolts, padlocks, door locks etc. Also supply scaffolding couplers, pressure die casting and agricultural machinery spare parts.
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