| 摘要 |
<p>On a bottom cover (18), which is mounted on bottom surface of a valve body (6) of selector valves (1A) and (1B) for the purpose of covering unnecessary holes, engaging sectors (28) are formed, and by engaging the engaging sectors (28) with engaging edges (4b) of a rail (4), the selector valves (1A) and (1B) are mounted on the rail (4) via the bottom cover (18). <IMAGE></p> |
