The gas nitriding technology of H13 steel was studied by an orthogonal test.
运用正交试验法，研究H13钢气体渗氮工艺。
The gas nitriding process control systems are designed to provide a fully automatic operation.
气体氮化过程控制系统的设计，提供了全自动的操作。
The gas nitriding process control systems are designed to provide a fully automatic operation.
气体氮化过程控制系统的设计，提供了全自动的操作。
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