How does Filip Muller use imagery in Eyewitness Auschwitz: Three Years in the Gas Chambers?

Examples of Imagery:

When the execution was over, fifty naked bodies were lying on the ground behind the wall. A few were still breathing stertorously, their limbs moving feebly while they sought to raise their blood-stained heads; their eyes were wide open: the victims were not quite dead because the bullets had missed their mark by a fraction.

Our working day began early in the morning when we lined up in the fenced barrack yard, ready to march off to the death factories. There the next twelve hours were completely taken up with hard labour. The generators had to be declinkered; the dead dragged to the ovens for cremation, having first had their gold teeth wrenched out and the women their hair cut off; coke had to be brought in; ashes had to be raked out, and finally the crematorium had to be cleaned and disinfected.