| 摘要 |
Tubular membranes used in apparatus for reverse osmosis or hyperfiltration treatment of feed solutions, comprising a tubular semi-permeable membrane and a coaxial porous support tube, have improved end seals in which the support tube is provided with resilient end portions, a portion of the membrane at each end extends radially of the end face of the corresponding resilient end portion of the support tube and sealing means, e.g., O-rings or washers, urge the radially extending portions of the membrane into sealing contact with the resilient end portions.
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