{HEAD ~ The reel changer} 26 is provided with {TAIL ~ a reel holding lever} 31 turnably holding the reels 30a and 30b, and a detector 32 for measuring the amount of the web 7 wound around the reel 30a or 30b 
{ HEAD ~ The reel changer } 26 is provided with { TAIL ~ a reel holding lever } 31 turnably holding the reels 30a and 30b , and a detector 32 for measuring the amount of the web 7 wound around the reel 30a or 30b
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