After maintenance, all safety devices must be recovered and checked for their Validities. Maintenance and repairing must be executed by qualified experts.
检修结束后，所有的安全设施必须放回原处，并检查其有效性。维护和维修必须由有资质的专业人员实施。
After maintenance, all safety devices must be recovered and checked for their Validities. Maintenance and repairing must be executed by qualified experts.
检修结束后，所有的安全设施必须放回原处，并检查其有效性。维护和维修必须由有资质的专业人员实施。
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