1. To manufacturers actual investigation, the scale of the factory must understand; 2. The quality of the product is better, and prices are reasonable; 3. After-sales service is better, can small solar street light sign a formal service contract.
1. To manufacturers actual investigation, the scale of the factory must understand;
2。 The quality of the product is better, and prices are reasonable;
3。 After-sales service is better, can small solar street light sign a formal service contract.