| | | | ︔ | | ︔ | | | | | 1. | | | | 2. | | | | | | 3. | | | | | | 1. | | | 2. | | | | | | 3. | | | | | 1. | | | | 2. | | 0.15 MPa | | 3. | | | | | ︵ ︽ ︾ ︶ |