傾斜装甲板での屈折
https://4.bp.blogspot.com/-iU_wI8fsze0/WdOdMhBcrTI/AAAAAAAAJu4/ws56lkg2iAA56oni1CmDw7aEt-ZkjNfAQCLcBGAs/s640/polish.jpg
傾斜装甲版での弾芯の破損
http://i.imgur.com/VcdOeaV.jpg