| 摘要 |
PCT No. PCT/GB91/01025 Sec. 371 Date Feb. 14, 1992 Sec. 102(e) Date Feb. 14, 1992 PCT Filed Jun. 25, 1991 PCT Pub. No. WO92/00476 PCT Pub. Date Jan. 9, 1992.A valve comprises a valve body (2) defining a through passage (3), a branch passage (7), and an aperture (11) in the wall of the through passage. A closure member (12) is movable between a first position in which the closure member seals the aperture and a second position in which the closure member establishes communication between the through passage and the branch passage.
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