How to repair the broken chairs of primary school students?

First, buckle the lifting seat upside down on the ground, and remove the four screws on the seat plate with a screwdriver, so that the seat plate and the base can be separated.

Secondly, grab the fixed iron plate and lift it, then knock down the chassis with a hammer, turn the bottom plate over after the fixed iron plate and chassis are completely disassembled, then pry open the clamp spring in the middle of the chassis with a screwdriver, grab the lifter and lift it gently, and then the lifter and chassis are completely separated.

Then check whether the lifting device is pneumatic or hydraulic. If it is a pneumatic lifting chair, there is also a cylinder device between the chair surface and the chassis. We need to check whether this cylinder device is damaged. If it is damaged, you should buy a new cylinder to replace it in time. If it is a hydraulic lift chair, we need to check whether the hydraulic rod leaks oil. If it leaks oil, it's no use replenishing it. It is necessary to replace the new hydraulic rod in time, otherwise there will be certain safety hazards.

Pupils are children who are in primary school.

1, which used to refer to students studying in imperial academy Children's Department and private schools, now refers to students studying in primary schools. [1] Increase teaching and salary, don't be bound. From the age of eight to twelve, the rate depends on the number of times words are recited.

2. Metaphorically, someone who wants to learn something from scratch. Often used to express modesty. [1] Mao Zedong's preface and postscript: "It is my wish to learn from the masses and continue to be a primary school student with all comrades in the party."