钉钉子是生活中经常会遇到的事情,而在钉钉子的过程中受伤或由于钉子太小难以下锤的事情时常会碰到,特别
问题描述：
钉钉子是生活中经常会遇到的事情,而在钉钉子的过程中受伤或由于钉子太小难以下锤的事情时常会碰到,特别
答
The delicate life comes from the the detail design of life ,thus based on this idea of life ,we have designed security devices used for driving nails ,considering some tiny things in life .Driving nai...