Pneumatic brake transmission pressure gauge does not work.
The residual height of the bus tire protection layer is 1.6 mm.
In both cases.✓الإجابة الصحيحة
الشرح
The air-brake pressure gauge must function so the driver can verify braking pressure before and during travel. Bus tread at 1.6 mm is also below the permitted minimum, so each condition is independently disqualifying.