Heavy vehicle high (1)

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Across
  1. 4. Articulated vehicle (2 words)
  2. 5. B triple (2 words)
  3. 6. Accelerator pedal (2 words)
  4. 9. Clutch pedal (2 words)
  5. 10. Brake fluid (2 words)
  6. 11. Crankshaft
Down
  1. 1. Ball joint (2 words)
  2. 2. B double (2 words)
  3. 3. Air filter (2 words)
  4. 4. Automatic transmission (2 words)
  5. 7. Chassis
  6. 8. Brake pad (2 words)