The invention gives {HEAD ~ rules} how additional hydrodynamic bearing portions can become provided on the outer portions of {TAIL ~ the piston shoes}, whereby those portions will carry an additional load by hydrodynamic actions 
The invention gives { HEAD ~ rules } how additional hydrodynamic bearing portions can become provided on the outer portions of { TAIL ~ the piston shoes } , whereby those portions will carry an additional load by hydrodynamic actions
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