Each of the support bearings has a respective geometric center, while {TAIL ~ each} of the transverse seals has {HEAD ~ an annular abutment surface} engaging a respective annular contact surface of the crosshead 
Each of the support bearings has a respective geometric center , while { TAIL ~ each } of the transverse seals has { HEAD ~ an annular abutment surface } engaging a respective annular contact surface of the crosshead
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH