PAn – phrases

cemented pan 胶结层

clay pan 粘磐

hard pan 犁底层

iron pan 铁磐

lime pan 生硝

plough pan 心土层

silt pan 粘粒磐

soil pan 硬土磐

thick iron pan 厚铁磐

thin iron pan 薄层铁磐

thin pan 薄层磐

tillage pan 心土层