1. First, draw a model of a circular pool.

2, and then according to the model shop 370 mm wide wall, pay attention to the upper and lower joints.

3. Then slowly close the mouth upwards to complete the round pool built with the wall of Sanqi. Traditionally, people call the 370MM thick wall "Sanqi Wall", which refers to the horizontal direction of ordinary standard red brick and the width of an mortar joint, with a width of 370 mm. ..