电池的保质期从出货之日算起为半年。
The period of warranty is half a year from the date of shipment.
七年时限从学员通过第一门专业阶段考试之日算起。
The seven year time limit starts when a student passes their first Professional level exam.
七年时限从学员通过第一门专业阶段考试之日算起。
The seven year time limit starts when a student passes their first Professional level exam.
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