In the illustrated embodiment, this lower retaining portion or hole 15 forms a disinfector chamber in which, when the instruments 6 and the supply hoses 16 are retracted and when the grips 7 are folded in, {HEAD ~ these parts} are subjected to {TAIL ~ an automatic cleaning} and disinfection 
In the illustrated embodiment , this lower retaining portion or hole 15 forms a disinfector chamber in which , when the instruments 6 and the supply hoses 16 are retracted and when the grips 7 are folded in , { HEAD ~ these parts } are subjected to { TAIL ~ an automatic cleaning } and disinfection
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