piston rod area 活塞杆面积
Bore and rod area ratios 汽缸内径和连杆截面比
rod-free area 无视杆细胞区
protecting area of lightning rod 避雷针保护范围
Inversely proportional to the cross-sectional area of the rod.
棒子的横截面积，成反比。
The relative reliable way is using fixed minor slope Angle of supporting rod or trestle and changing the height of camera to obtain different sample area.
认为比较可靠的方法是使用固定小倾斜角的支竿或支架，用改变高度调节取样面积。
The comparing result showed that the arc transition area between rod and head was easy to produce stress concentration which results in fatigue failure.
结果表明，该连杆螺栓杆部与头部的过渡圆弧处容易产生应力集中，造成其疲劳断裂。
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