The "IP" and "GR" suffixes are frequently found in European or international regulatory documentation:
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Often followed by numbers (e.g., IP68), this rating indicates a device's resistance to dust and water [1]. The "IP" and "GR" suffixes are frequently found
In manufacturing, "GR" is sometimes used as a suffix to denote compliance with environmental standards, such as RoHS (Restriction of Hazardous Substances) or Green Packaging [3]. 2. Networking and Device Tracking Watch Ip 2008GR