顶盖、底盖、盖板
top cover， bottom cover， and cover board
top cover
bottom cover
and cover board
板形板厚综合控制
combined shape and gauge control
integrated control of strip flatness and thickness
齿板形状
shape of sprocket wheel
shape of chain gear tooth plank
明尼苏达书面形状板
minnesota paper form board
冷变形形状记忆效应
cold deformation shape memory effect