head of unit meaning in Chinese

单位负责人
单位主管

The ranks of reserve captain , lieutenant and second lieutenant shall be conferred with the approval of the heads of units at the divisional level that have the power to appoint and remove officers
第二十四条转服军官预备役的军官和文职干部，其预备役军官军衔，按照其原现役军官军衔等级或者文职干部级别确定。
The promotion from reserve lieutenant to reserve captain or from reserve second lieutenant to reserve lieutenant shall be approved by the heads of units at the divisional level that have the power to appoint and remove officers
（四）预备役中尉晋升预备役上尉、预备役少尉晋升预备役中尉，由有军官职务任免权的师级单位正职首长批准。