Label the diagram below.
Choose ONE WORD from the passage for each answer.

• A pair of [7] are lifted in order to shut out water from canal basin.

• A [8] is taken out, enabling Wheel to rotate.

• Hydraulic motors drive [9] .

• A range of different-sized [10] ensures boat keeps upright.

• Boat reaches top Wheel, then moves directly onto [11].

• Boat travels through tunnel beneath Roman [12].

• [13] raise boat 11 m to level of Union Canal.