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动力单元 dònglì dānyuán
avia.	power-pack
hydroel.st.	power pack
manag.	power unit
tech.	drive unit; power unit (设备，部件，厂，组,头)
混合动力汽车动力单元 dònglì dānyuán
auto.	power-train unit
动力单元〔装置，组〕 dònglì dānyuán
el.	power pack

动力 单 元: 8 phrases in 4 subjects

Automobiles	3
Aviation	1
Rail transport	1
Technology	3