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1. For new or repaired pillars that have been stored on the ground for more than 3 months, spot check shall be carried out as required before going down the well; The pillars stored for more than 1 year shall be tested one by one to check whether the performance of the pillars has changed.
2. The FRP hydraulic prop whose performance cannot be guaranteed or damaged during storage and transportation is not allowed to be used in the well. The FRP hydraulic prop shall not be overhauled or stored in the open air.
3. The maintenance site should be clean and tidy, and all kinds of pillars to be repaired and pillars qualified for maintenance should be classified and stacked neatly.
4. Maintenance personnel should be able to correctly use special maintenance equipment such as column dismantling machine and test bench. Regularly check, test and repair various instruments of the equipment.
5. After maintenance, the glass fiber reinforced plastic hydraulic prop to be used, which has passed the test in all performances, shall be stored vertically or obliquely.
