论文部分内容阅读
美国一家制锁公司新近研制出一种报警式无钥匙门锁。其顶板上的照明显示板可显示出置入的数字编码正确与否。当插入正确的编码卡片时,便立即显示出一个“U”字,以示编码正确,并发出开锁信号将门锁
A lock company in the United States recently developed an alarm-type keyless door locks. The lighting panel on the top panel shows whether the digit code placed is correct or not. When the correct code card is inserted, a “U” is displayed immediately to show that the code is correct and an unlock signal is issued to lock the door