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What does a gray stripe on top of a canister indicate?

  1. Filter for removing gas vapors

  2. Filter for removing dust or other particulate matter

  3. Indicator for chemical expiration

  4. Filter for reducing moisture

The correct answer is: Filter for removing dust or other particulate matter

The presence of a gray stripe on top of a canister specifically indicates that it is equipped with a filter designed for removing dust or other particulate matter. This information is crucial for users as it highlights the canister's capability to effectively capture and eliminate particulates from the air before they can enter the system, ensuring a cleaner environment during fumigation processes. Understanding the function of different colored stripes on canisters can significantly enhance safety and effectiveness in the fumigation procedure. Identifying the type of filter enables users to select the appropriate canister for their specific needs, helping to maintain a safe working environment and improve the overall efficacy of the fumigation operation.