A pig's knee

墙头眼猪───Pig in the wall;膝盖───knee

In order to facilitate dry, pig should make cement floor. 7 peripheral wall to close the back wall thick crates, frontispiece, former wall in winter to increase the heat preservation facilities.───为了便于干燥，猪舍应做成水泥地面。7外围墙壁要厚实严密猪舍的后墙、山墙、前墙在冬季时要增加保温设施。