ccc, solli solli, i think i still dun understand ne...solli ne! (1)if there is only one 進氣道, how can it have a long and a short one when there is only one? (2)how does 蝴蝶閥 actuates the change over? (3)at high speed, 斷面(section) should be smaller & 進氣管的長度 should be shorter, is that correct?
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