{TAIL ~ The gas} supplied to the gas supply tube 7 reaches the grooves 16, taking paths or passages branched from the center of the gas supply tube or passage 7, and diffuses along {HEAD ~ the grooves} 16 in the axial direction of the stress detection mechanism 5 and is then ejected outside 
{ TAIL ~ The gas } supplied to the gas supply tube 7 reaches the grooves 16 , taking paths or passages branched from the center of the gas supply tube or passage 7 , and diffuses along { HEAD ~ the grooves } 16 in the axial direction of the stress detection mechanism 5 and is then ejected outside
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