The friction in AC servo table is researched, which is based on torsion measuring and current measuring.

采用基于扭矩测量和伺服电流测量两种方式对工作台系统中的摩擦力进行了研究。

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But that stance is a source of friction with Republicans, who say bigger changes need to be on the table for a deal to be reached by year's end.

WSJ: AARP Takes Hard Line Against Entitlement Cuts