铜缸在古代被称为是“海”，缸就是缸为什么会被称为是海呢？海很大，而缸却那么小，怎么比较呢?其实铜缸被称为门海的原因有三，下面我们一起去了解一下！

In ancient times, the copper cylinder was called the "sea". The cylinder is the cylinder. Why is it called the sea? The sea is big, but the tank is so small. How can we compare it? In fact, there are three reasons why copper tanks are called Menhai. Let's go and have a look!

1.海字不单是指大海，它还借指那些体量较大的器皿，国宝“渎山大玉海”其实就是一尊硕大无朋的玉缸；

1. The word "sea" not only refers to the sea, but also refers to those vessels with large volume. The national treasure "Dushan jade sea" is actually a huge jade jar;

2.古人期盼在门前有了大海房屋就不会再有火灾的发生；

2. The ancients expected that with the sea in front of the door, there would be no fire;

3.因为这些体积较大的铜大缸可以储存大量的水，关键的时候可以用来灭火，

3. Because these large copper tanks can store a large amount of water, they can be used to extinguish the fire when it is critical,

而且这些铜缸就在门前摆放着可以随时取用，所以因之整个功效，才有了门前之海——门海的称呼。

Moreover, these copper jars are placed in front of the door and can be used at any time. Therefore, because of their whole effect, they have the name of the sea in front of the door - the sea in front of the door.