孤独无援地行动

subsoiler (subsoil plough), oscillating-share type subsoiler

plough pan

Big Dipper【天】;Plough【天】

trailing plough

paddy field plough

rotary cultivator【农机】;rotary plough【农机】;rotary tiller【农机】

reversing unit reversible plough

trussed-beam plough