門閂
来自维基百科，自由的百科全书
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門閂又稱門栓，為關門後橫插在門內使其不能被推開的木棍或鐵棍，主要用於對開式門。一般在門內左右牆上安鐵環或掏牆槽，關門後將比兩扇門寬度稍長的門閂兩端放入鐵環或牆槽中，即抵住門不動不開，如在門內中間安上鐵槽或上彎鐵鼻加固則更為安全[1]。
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