A、0.75mm B、0.5mm C、0.6mm D、0.75mm
A、進(jìn)氣0.28mm,排氣0.58mm B、進(jìn)氣0.36mm,排氣0.69mm C、進(jìn)氣0.25~0.30mm,排氣0.30~0.35mm D、進(jìn)氣0.30~0.35mm,排氣0.35~0.4mm