Several settlement observation points should be set at the four corners and the middle points of the building, and the observation requirements should follow the relevant documents,
Several settlement observation points should be set up at the four corners and central points of the building, and the observation requirements should be carried out in accordance with the relevant documents,
Several settlement observation points shall be set at the four corners and the middle part of the building, and the observation requirements shall be in accordance with the relevant documents,<br>