{HEAD ~ The spring} 23 is dimensioned in dependence on the weight of the upper frame, such that the work plate can be raised and lowered effortlessly by {TAIL ~ hand} 
{ HEAD ~ The spring } 23 is dimensioned in dependence on the weight of the upper frame , such that the work plate can be raised and lowered effortlessly by { TAIL ~ hand }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL