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Hello! I've reviewed the user guide for the Relief Valve Drill Guide. It outlines a two-step process for creating a hole using punch pliers and a 2.5 mm drill bit, and contains multilingual instructions. I am ready to answer any specific questions you may have about the process.
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What is the first step in creating the hole?
What size drill bit is needed to enlarge the hole?
What languages are the instructions available in?