Conduct overall check on the equipment,especially the rubber sealing part to see if they are in good condition periodically(every one year or half year).Repair them if any.

• 定期(一年或六个月)对设备进行一次全面检查，尤其是橡胶密封部分，看是否有损坏，如有应进行维修，直至恢复为止。