the wetted perimeter湿周法
The shortest perimeter最短的周长
that the perimeter stress周边应力
Forming the perimeter成形周长
The Perimeter Institute圆周理论物理研究院
the effective emitter perimeter发射区有效周长
shoot from the perimeter远射
The Perimeter of Circle圆的周长
integral on the perimeter边界积分