A peephole is a small opening or lens installed in a door, allowing occupants to see outside without opening the door. Typically positioned at eye level, peepholes provide a way to identify visitors or check for potential threats while maintaining security and privacy. They often feature a wide-angle lens that offers a broader view of the area outside the door. Peepholes are commonly used in residential homes and apartments, enhancing safety by allowing individuals to see who is at the door before deciding to open it. Some modern peepholes may include video capabilities, further improving security.

英語での「peephole」の定義と意味

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