Watch maintenance can only be conducted by authorized service center.

腕表保养仅可由授权维修服务中心进行。

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Most manufacturers recommend divers to have their diving watch pressure tested by an authorized service and repair facility annually or every two to three years and have the seals replaced.

大局部的制造商建议潜水员到授权机构停止潜水表压力测试并且每年或两到三年修缮一次潜水表的零件，以及改换密封件。

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The defendants were being housed in separate buildings on the jail grounds and were all under suicide watch, a jail official said on condition of anonymity because he was not authorized to speak publicly on the matter.

NPR: Police: Delhi Gang Rape Suspect Kills Self In Jail

Singh, along with four other men on trial with him on rape, murder and abduction charges, had been under a suicide watch, another jail official said on condition of anonymity because he was not authorized to speak publicly on the matter.

NPR: Police: Delhi Gang Rape Suspect Kills Self In Jail