| 摘要 |
<p>1491932 Valves WILLIS OIL TOOL CO 29 Jan 1975 [6 Feb 1974] 53068/75 Divided out of 1491931 Heading F2V [Also in Division G3] The description is similar to that in parent Specification, but the claims are directed to the relay valve or actuator pilot (105) Figs. 1 to 3 (not shown).</p> |
