Is the mould level and flow control in a closed loop system and are abrupt changes alerted, monitored and affected blooms controlled/downgraded?

• 铸模液面高度和（钢水）流控制是否在封闭的循环系统中进行？对突发情况是否有报警，监控措施？并且对受影响的钢坯得到控制和降级使用？