当一个铁质活板门被激活后使用活塞推动,即使它周围没有红石信号输入,它依然打开,除非收到红石信号激活,才会改变状态.

When an iron trapdoor is activated and pushed by a piston, it will remain open even if there is no redstone input around it, and will not change state until it is activated by a redstone signal.