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The correct method for relieving gas pressure on an impact absorber is by drilling. This process allows for a controlled release of gas to ensure safety and prevent sudden discharges that could lead to injury or further damage during the repair process.
Drilling creates a safe pathway for the gas to escape, helping to neutralize any built-up pressure without risking an explosive or uncontrolled release. This is a critical step, as handling pressurized components without proper precautions can be extremely hazardous.
Other methods like heating, bending, or welding are not appropriate for managing gas pressure within these types of components. Heating could lead to expansion and potentially dangerous ruptures, while bending or welding may compromise the structural integrity of the absorber and are not designed to safely relieve pressure.