1. Operation shall be carried out with certificate, and special person shall be assigned for the machine; 2. The material must be cut in accordance with the requirements of mix proportion, and the water cement ratio must be strictly controlled; 3. Before starting the machine, check whether the machine operates normally, and report any problems found in a timely manner; 4. Loading, unloading and troubleshooting operations are prohibited before the machine stops stably. Power supply must be cut off when troubleshooting equipment; 5. After the completion of each day, it shall be cleaned in a timely manner