这个函数主要用来支持链接页面。
第一个月主要用来建立基本运作。
The first month was mainly spent establishing basic operations.
压力控制阀主要用来控制液压系统中液流压力。
Pressure control valve is mainly used to control the pressure of fluid flow.
我们大家都要利用这种或那种气象消息，主要用来作出决定。
We all use weather information of one kind or another, mostly to make decisions.
手操器是一种辅助仪表，主要用来实现控制系统的手动操纵。
The manual operator is supporting instrument which achieves manual operation in a control system.
手操器是一种辅助仪表，主要用来实现控制系统的手动操纵。
The manual operator is supporting instrument which achieves manual operation in a control system.
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