The three major constructions on the axle wire constitute the core of the Temple of Heaven.
三个主要的建筑上的轴丝构成的核心，天坛。
The pistons are at certain intervals, and are interconnected via a coupled axle; the valve core and a valve rod are connected into an integrative body.
各活塞间相隔一定距离，并通过连轴互相连接，阀芯与阀杆连成一整体。
The internal of the core axle end is provided with a needle bearing, which balances the bearing of assembly wheel hub and enable the operating more stable.
在芯轴端部 内侧设置滚针轴承，使整个轮毂单元的受力平衡，运转更平稳。
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