求翻译：主营产品为风机主控和变桨距控制系统，市场相对稳定，且有稳定的客户资源；已开拓业务有风机性能测试，主要是为验证风机性能。是什么意思？

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main product for the wind machine away from the main control program and change control system, the market remained relatively stable, and there is a stable customer resources; has opened up new business with a wind machine performance test, primarily to verify blower.

The main camp product master control and changes the prop pitch control system for the air blower, the market is relatively stable, also has the stable customer resources; Has developed the service to have the air blower performance test, mainly is for confirms the air blower performance.

Product for the fan control and pitch-control system, the market is relatively stable, and a stable client resources has expanded the business fan performance testing, mainly to verify that the fan performance.

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