The production trial run, which may involve the customer where necessary, is used to check the effectiveness of the production process.
生产试运行，当需要时可请客户参加，是用来检查生产过程有效性的。
The production trial run, which may involve the customer where necessary, is used to check the effectiveness of the production process.
生产试运行，当需要时可请客户参加，是用来检查生产过程有效性的。
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