Check hydraulic cylinder operation and seal, replace seal if necessary.
检查液压油缸的动作与密封，需要时更换密封件。
Moreover, the obturating ring can reliably seal the cylinder and the end cover.
且密封圈能将筒体和端盖可靠的密封。
Master cylinder, cap, dust seal.
总泵，帽，防尘密封。
Replace the cylinder outlet seal and valve cap.
替换钢瓶排气口密封和阀门帽。
Replace the cylinder outlet seal and valve cap.
替换钢瓶排气口密封和阀门帽。
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