A.40mm,40% B.50mm,40% C.50mm,50% D.40mm,50%
A.15-50mm,50% B.10~40mm,40% C.15-50mm,40% D.10-40mm,50%
A.加厚該處船底板,加強板 B.加厚該處船底板,防腐板 C.防撞擊,防擊板 D.防撞擊,加強板