As shown in the FIG 2c, a first insulation layer 35 encloses {HEAD ~ the entire oil tank} 17, which also contains the electric motor 15 and {TAIL ~ the hydraulic pump} 16 
contains
As shown in the FIG 2c , a first insulation layer 35 encloses { HEAD ~ the entire oil tank } 17 , which also contains the electric motor 15 and { TAIL ~ the hydraulic pump } 16
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH