Maintain a "mulch-free" area around the perimeter of the home that it is at least 12" wide and comprised of rock or gravel.
保持一个围绕房屋周边的“无植被覆盖区”，由至少12寸宽的岩石或砾石组成。
Expcrimental stress analysis by electrical measuring method was carried on the ring plate with fixed outer perimeter, free inter perimeter and received even load.
用电测法对外周边固定、内周自由、受均布载荷的环板进行实验应力分析。
Expcrimental stress analysis by electrical measuring method was carried on the ring plate with fixed outer perimeter, free inter perimeter and received even load.
用电测法对外周边固定、内周自由、受均布载荷的环板进行实验应力分析。
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