In its closed condition, the abutment structure is capable of receiving a forcible impulse by an implement, such as {HEAD ~ an iron}, advancing along the upper surface of {TAIL ~ the seaming board} 
In its closed condition , the abutment structure is capable of receiving a forcible impulse by an implement , such as { HEAD ~ an iron } , advancing along the upper surface of { TAIL ~ the seaming board }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL