Previously, the maximum validity for these purposes was six months, two entries.
而此之前，最长的有效期为六个月二次入境。
Finally, the validity criterion of the scan variable table built is given by analyzing the maximum waiting time.
通过对周期性变量最大等待时间的分析，给出判断扫描变量表有效性判据。
Maximum number and validity period of downloads can be configured.
可设置大量有效的下载。
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