Movement between the ring sealing surface coated with grease to prevent the movement ring sealing surface wear in the pump drive.
动静环的密封面之间涂以润滑脂，防止动静环密封面在水泵开车前磨损。
The connecting rods between the guide vane servomotor piston rods and guide vane operating ring shall be of steel, with grease lubricated bearings.
导叶操作圆环将被设计接受导叶辅助电动机连接杆和别针在圆环的相反点。
Usually, the outer ring of the tl bearings has grease groove, bearings having no grease groove are to be provided, too.
外球面球轴承外圈一般带油槽，也生产外圈无油槽的产品。
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