During suction strokes of the pistons 11, {HEAD ~ the refrigerant gas} in the suction chambers 115, 115 is sucked into {TAIL ~ the pump working chambers} 14, 14, respectively, through the suction openings 17, 17 
is sucked into
During suction strokes of the pistons 11 , { HEAD ~ the refrigerant gas } in the suction chambers 115 , 115 is sucked into { TAIL ~ the pump working chambers } 14 , 14 , respectively , through the suction openings 17 , 17
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH