曾有一位美国商人,在当地报纸打出广告,谁能不用钥匙开启一把三环锁,奖4000美元,但始终无人能够领取。为什么?奥秘在于这把三环锁的锁芯比普通锁多出一排弹子。也是历史巧合,1933年,当一名中国青年在山东黄城西关顺记工厂,拆解一把美国产弹子挂锁时,他的仿造思路同样被这枚小小锁芯卡住。这位青年就是后来为我国造锁行 There was once an American businessman who advertised in a local newspaper and who could open a three-ring lock without a key and won for $ 4,000, but no one was able to receive it. Why? The secret is that the three-lock cylinder lock than the ordinary lock more than a row of marbles. It was also a coincidence that in 1933, when a Chinese youth dismantled a U.S.-made marbles padlock at Shun Hsuan Kee’s factory in Huangcheng, Shandong, his counterfeit ideas were also caught by the small cylinder. This young man was later locked for my country