[经] maintenance cost
... 保兑信用证 confirmed credit 保养费 maintenance cost 保利原理 pauli principle ...
maintenance fee
... mail transfer rate信汇汇率 maintenance fee赡养费;生活费;保养费 maintenance grant生活补助金 ...
[经] upkeep
... uphold vt.支持;赞成;确认 upkeep n.保养费,维修费 upright a.垂直的,直立的;正直的 ...