{HEAD ~ An intake air duct} according to the present invention can achieve the aforementioned objects, and can serve as {TAIL ~ a passage} for supplying air to an engine 
serve as
{ HEAD ~ An intake air duct } according to the present invention can achieve the aforementioned objects , and can serve as { TAIL ~ a passage } for supplying air to an engine
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH