鴬張り (うぐいすばり) — nightingale (flooring); method of laying floors to deliberately make a noise (like a nightingale's call) when walked across (security feature)
鴬張り
う ぐ い す ば り
鴬張り (うぐいすばり) — nightingale (flooring); method of laying floors to deliberately make a noise (like a nightingale's call) when walked across (security feature)