公司原本通过销售引擎和零部件来获取利润，而现在则通过提供客户长期的检修和保养服务或者称之为“按飞行小时包修合同”。
Profits used to come from selling engines and replacement parts. Now they come from providing long-term repair and maintenance-or "power by the hour".
公司原本通过销售引擎和零部件来获取利润，而现在则通过提供客户长期的检修和保养服务或者称之为“按飞行小时包修合同”。
Profits used to come from selling engines and replacement parts. Now they come from providing long-term repair and maintenance-or "power by the hour".
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