Category Nuances for valve_cover:

• standard,
• moving,
• surrounding,
• actual,
• ferrous,
• necessary,
• outer,
• vital,
• painted,
• flexible,
• whole,
• major,
• automotive,
• extraneous,
• special,

Simple Categories for valve_cover:

• item,
• object,
• cover,
• part,
• assembly,
• structure,