Two Stable Elements的意思|示意

两稳定器 The secondary battery has four directors, each of which has its own rangefinder and radar, and may control all or any part of the dual-purpose battery. There are two secondary (dual-purpose) battery plotting rooms similar to those of the main battery, except that they contain no graphic plotting devices. Each is equipped with two computers, two stable elements, the necessary indicating instruments, and switching equipment. With director controlled fire it is possible to engage four secondary battery targets simultaneously with independent illumination control.