以提高耐磨性为主的大面积激光相变硬化必须采用光斑搭接方法，在搭接处的回火带是不可避免的。
The big area laser transformation hardening must adopt the methods of facular joint in giving priority to attrition, and the tempering zone can't be avoided in the joint.
明代宣化古城的功能在从王城到军事功能为主的镇城，再到商业性为主的府城，其城市布局也从王城布局到府城布局。
The ancient city of Xunhua in Ming Dynasty first changed from a King city into a military centre, then changed into a commercial city.
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