2.PP： Pre-production Production。3.MP： Mass Production。4.MR： The abbreviation "；MR"；is not commonly associated with production and material preparation.Additional context is needed to determine its specific meaning in this context。
导读2.PP： Pre-production Production。3.MP： Mass Production。4.MR： The abbreviation "；MR"；is not commonly associated with production and material preparation.Additional context is needed to determine its specific meaning in this context。
1. PR: Pre-production Run 2. PP: Pre-production Production 3. MP: Mass Production 4. MR: The abbreviation "MR" is not commonly associated with production and material preparation. Additional context is needed to determine its specific meaning in this context.
2.PP： Pre-production Production。3.MP： Mass Production。4.MR： The abbreviation "；MR"；is not commonly associated with production and material preparation.Additional context is needed to determine its specific meaning in this context。
