An intake air duct serves as a passage for supplying {TAIL ~ air} to an engine, and includes {HEAD ~ a first intake air passage}, a second intake air passage, an opening and closing valve, an interlocking member and a coiled spring 
An intake air duct serves as a passage for supplying { TAIL ~ air } to an engine , and includes { HEAD ~ a first intake air passage } , a second intake air passage , an opening and closing valve , an interlocking member and a coiled spring
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH