7 , ▁ 2 0 1 6 . ▁, ▁performed ▁by ▁L uk áš ▁V endl , ▁February ▁ 1 6 , ▁ 2 0 1 6 . ▁ ▁Category : 1 7 8 5 ▁compos itions ▁Category : L ost ▁musical ▁works ▁Category : Com pos itions ▁by ▁Wolfgang ▁Ama de us ▁Moz art ▁Category : Com pos itions ▁by ▁Antonio ▁Sal ieri <0x0A> </s> ▁A ▁hydro gen ▁compress or ▁is ▁a ▁device ▁that ▁increases ▁the ▁pressure ▁of ▁hydro gen ▁by ▁reducing ▁its ▁volume ▁resulting ▁in ▁com pressed ▁hydro gen ▁or ▁liquid ▁hydro gen . ▁ ▁Com press or ▁vs ▁p ump ▁H ydro gen ▁compress ors ▁are ▁closely ▁related ▁to ▁hydro gen ▁p umps ▁and ▁gas ▁compress ors : ▁both ▁increase ▁the ▁pressure ▁on ▁a ▁fluid ▁and ▁both ▁can ▁transport ▁the ▁fluid ▁through ▁a ▁pipe . ▁As ▁g ases ▁are ▁compress ible , ▁the ▁compress or ▁also ▁reduces ▁the ▁volume ▁of ▁hydro gen ▁gas , ▁whereas ▁the ▁main ▁result ▁of ▁a ▁p ump ▁raising ▁the ▁pressure ▁of ▁a ▁liquid ▁is ▁to ▁allow ▁the ▁liquid ▁hydro gen ▁to ▁be ▁transport ed ▁elsewhere . ▁ ▁Types ▁ ▁Re ci proc ating ▁p ist on ▁compress ors ▁ ▁A ▁proven ▁method ▁to ▁compress ▁hydro gen ▁is ▁to ▁apply ▁reci proc ating ▁p ist on ▁compress ors . ▁W id ely ▁used ▁in ▁ref iner ies , ▁they ▁are ▁the ▁back bone ▁of ▁ref ining ▁cru de ▁oil . ▁Re ci proc ating ▁p ist on ▁compress ors ▁are ▁commonly ▁available ▁as ▁either ▁oil -