{HEAD ~ The coiled spring} is disposed swingably outside the first intake air passage or the second intake air passage, and has a swinging end, which is brought into contact with a surface of {TAIL ~ the interlocking member} 
{ HEAD ~ The coiled spring } is disposed swingably outside the first intake air passage or the second intake air passage , and has a swinging end , which is brought into contact with a surface of { TAIL ~ the interlocking member }
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL