pophole是什么意思？

Popholes:家畜（多指家禽）进入或离开地点（口）。
(畜の通行穴)from ジーニアス英和大辞典.
例子：each pophole must be at least 35 cm high and 40 cm wide（每个出口至少要35cm高和40cm宽）。

A hole in a fence or divider through which animals can pass,especially one allowing poultry access to the outside or allowing piglets access to the sow.