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