| 摘要 |
A plastics well pipe comprising an outer wall (1) an inner wall (2) and channels (4) formed by longitudinally extending partitions (3) being integral with the walls. The outer wall (1) is provided with bores (5), opening into channels (4) and at certain points the inner wall (2) has been removed for recovering liquids from the channels (4), which liquid flows into the channels (4) through the bores (5).
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