Plowshare iron犁铧钢
plowshare project犁头
plowshare bone犁状骨
plowshare have犁铧
plowshare twist犁铧的穹顶
plowshare tortoise犁头龟
trench plowshare开沟犁犁铧
Hand Plowshare Ken Earthworms手锄垦蚯蚓
plowshare geothermal concept普洛射尔地热概念
N（名词） the horizontal pointed cutting blade of a mouldboard plough 犁铧头