If there is a straight punching mold, core-metal get stuck in the mold. The modified core-metal is no longer removed, and apply a force forcibly flatness becomes nonstandard
With the straight punching mold core-metal stuck in the mold. will no longer take core-metal and applying pressure to forcibly distort the "extra" flatness
punching mold straight to the core-metal mold is to be addicted to. Core-metal is removed, you will not be able to force it to use force and the deformation, and the flat Tampines Rovers in the non-standard.