止し水すい板ばんMeanings1nounwatertight barrier; flood protection plate; waterproof boardingTechnical term for a physical barrier or plate used to prevent water ingress, such as in flood defense or construction.地ち下か鉄てつの入いり口ぐちには止し水すい板ばんが設せっ置ちされている。A watertight barrier is installed at the subway entrance.
