If the device fails either step 5 or 6 or both, it must be repaired or replaced.
如果这个装置没有通过第5步或第6步，则必须维修或更换。
The system must be repaired quickly, and it should not be necessary to change to perform the emergency work, even on the job site.
必须很快准备好系统，没有必要改变而去采取应急行动，即使是在工作现场也没有必要。
If a weld or the pipe itself is faulty, it must be replaced or repaired.
若焊缝或管子本身不合格，必须更换管子或修理。
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