| 摘要 |
<p>A valve which includes a housing, two axially spaced liners and a spool within the liners has fixing screws running through the housing. To make it possible for the screws to be placed near together but without having to make the liners any smaller in diameter, the screw holes are cut through into the liner space in the housing. The screw holes are sealed off from the outside by washers provided under the screw heads and a gasket provided between one outer side of the housing (opposite to the heads) and a support into which the screws extend.</p> |
