DescriptionSemaphore 2 (PSF).png English: an apparatus for visual signaling (as by the position of one or more movable arms Date 13 May 2019 Source Archives...
donated to the Wikimedia Foundation Author Pearson Scott Foresman Permission (Reusing this file) Other versions Semaphore (PSF).png Semaphore 2 (PSF).png...
Pearson Scott Foresman Permission (Reusing this file) Other versions Selfheal (PSF).png Semicircle (PSF).png Semidiameter (PSF).png Semaphore 2 (PSF).png...
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