关闭和打开移动电话的时间。
一个阀门能够关闭和打开多少次？美国尼伯科关闭阀和普通闸阀已经通过了耐疲劳试验。
How often can a valve be opened and closed? NIBCO Block valves and ordinary gate valves were subjected to endurance tests.
在这种情况下，您可以尝试将无线移动网络的设置，关闭和打开数据，似乎为我工作在个别情况下发生的。
In this case, you can try going to the Mobile Network Settings, and turning data off and on; seemed to work for me on the rare occasion it happened.
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