Fault diagnosis and maintenance technique for the hydraulic system of plastic-injection moulding machine are analytical from theory to practice in this paper.
文章从理论和实践方面对注塑机液压系统故障诊断与维修技术进行了分析研究。
Finally, practice has proved that the adoption of PLC control systems have greatly increased the machine's reliability and reduced workload of machine maintenance staff.
最后通过实践证明，采用PLC控制提高了万能铣床运行的可靠性，减轻了机床维修人员的工作量。
There are few practice and operation training in NC course because of the high cost of the NC machine and the operation and the maintenance.
形成这种局面的主要原因是生产用数控机床价格昂贵，操作使用和维修费用高，难以用作教学培训设备。
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