How to polish kitchen sink corner?

Because the installation of the basin needs to keep the cabinet operating table and the sink in the same horizontal position, so after punching the table, it is also necessary to polish the table around the

opening hole slightly lower.

Note: Make sure the size is accurate when polishing. The grinding around the opening hole should not be too low. Generally, the water tank can be placed in the contrast. If the water tank is placed flush

between the two, it means that the grinding is just. Not enough or too much grinding will lead to concave and convex between the table, unable to maintain the unity of the horizontal position.