noun
protective plate; shield plate
A plate or board used to protect something from impact, heat, or other hazards. Common in technical and everyday contexts.
この機械には保護板が付いています。
This machine comes with a protective plate.
保護板を取り付けて、壁を傷から守る。
Install a protective plate to protect the wall from damage.
防護板 emphasizes defense against external threats (e.g., bullets, shrapnel), whereas 保護板 is more general protection.
Compound of 保護 (protection) and 板 (board, plate).