One option is to place your validation logic in a service layer.
一个选择就是把验证代码放到“Service”层中。
After delivery, a full service for validation, commissioning and maintenance is also provided.
交货后，也提供全程的核验、试车及维护服务。
After delivery, a full service for validation, commissioning and maintenance is also provided.
交货后，也提供全程的核验、试车及维护服务。
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