Project quality: 1. The installation of the main line slot is uniform and horizontal, the hook is set evenly and beautifully, the electrical box is assembled according to a unified standard angle, and the reserved length of the wire head in the electrical box is about 80 cm, which should not be wasted; 2. Each indoor trunking shall run vertically along the internal corner as far as possible. When the trunking is fixed with gun binding, the binding inside the trunking must cover the feet, and no vertical binding head is allowed to be exposed