The grease should be laid on the periphery of seal ring, the inner of ladder-shaped screw thread and chuck ring oil channel during installation.
安装时应将橡胶密封圈四周，梯形螺纹内，压环油槽内，中心管外径上涂黄油。
The grease should be laid on the periphery of seal ring, the inner of ladder-shaped screw thread and chuck ring oil channel during installation.
安装时应将橡胶密封圈四周，梯形螺纹内，压环油槽内，中心管外径上涂黄油。
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