When, under this condition, {TAIL ~ an ordinary shock} is applied to {HEAD ~ the internal gear} 3, the internal gear 3 absorbs the shock while flexing itself in the gap 23 
When , under this condition , { TAIL ~ an ordinary shock } is applied to { HEAD ~ the internal gear } 3 , the internal gear 3 absorbs the shock while flexing itself in the gap 23
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH