... pressure safety relief valve (pressure) diarrhea. Twist QS1 button to switch, let the pressure head set-point move ... (manual, KeJiao, according to SB1 button on), press the tire edge. Twist of the ... fit, basic press flat, then press the SB2 button, let the pressure head high speed rotating, until ... ,pls feel free to contact me . Hot Sale!!!tire retreading machine-JK-K tread pressed ...