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| 1. | Manually operate the temperature and pressure relief valve at least once a year to make sure it is working |
| 每年至少手动操作降温减压安全阀一次，以确认是否工作正常。 |
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| 2. | The portion of a computer or peripheral that houses the apparatus used to operate the machine manually |
| 操纵台计算机或外部设备的部分，容纳用来手动操作机器的装置以及为计算机操作者与中央器之间提供交流手段，常以键盘为表现形式 |
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