- delayed ppi
- 延遲: delay; lag; defer; postpone; ...
- 平面: plane; two dimensions; flat ...
- 位置: seat; place; location; site
- 指示器: indicator; pointer; director ...
- 平面位置指示器: plan position indicator ppi; plan-position indicator; plane position indicator (ppi); plane-position indicator; ppi (= plane position indicator)
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