feeders

One of the largest feeders for high school math competitions — including those that eventually lead to the IMO — is a middle school program called Math Counts.

高中数学竞赛参赛学生的最大的供应者之一，包括那些最终参加国际奥林匹克数学大赛的学生，是个叫Math Counts的中学项目。

The feeders include anterior spinal artery and its branches, and simultaneously it is frequently fed by posterior spinal artery.

其供血动脉为脊髓前动脉及其分支，脊髓后动脉也经常同时参与供血。

The paper analyzes drawbacks of control system of blade coal feeders of Baoding Thermoelectric Plant. With transducer technique, PLC technique and low voltage power line carrier technique, we improve on controller unit for coal transmission system of Baoding Thermoelectric Plant.

本课题对保定热电厂叶轮给煤机控制系统状况进行了分析，采用变频调速、PLC可编程控制器编程、低压电力线载波技术对叶轮给煤机控制系统进行改造。