Assertion: rake | /r/AtLocation | lower end of the tank
Facets:
Source sentences:
text: As it revolves the cranks (9) move the rakes backwards and forwards parallel to the bottom of the tank, but the cam (7) is so shaped that, when a rake is at the end of its strokes at the lower end of the tank, the rocker arm (5) and the bell crank (10) drop it so that it is just clear of the bottom.