| 摘要 |
The movable sleeve type valve is comprised of a two piece metallic housing retaining therein a cylindrical insert with fluid conducting ports, where said cylindrical insert is surrounded by a flexible tubular sealing member. Said housing also retaining a sleeve which, together with suitable actuating devices, is capable of readily displacing said tubular sealing member towards said cylindrical insert and therefore capable of interrupting fluid flow through said port.
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