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1.The elevator's riser tube panel is damaged, causing the elevator to stop working.
电梯的升降管面板损坏了，导致电梯停止工作。
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2. The technician replaced the riser tube panel on the lift.
技术人员更换了电梯上的升降管面板。
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3. The riser tube panel is essential for maintaining the elevator's safety and reliability.
升降管面板对于维护电梯的安全性和可靠性至关重要。