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