SpG definitions

SPG

Single-point ground
Found on http://www.encyclo.co.uk/visitor-contributions.php

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SPG

self-propelled gun
Found on http://www.translationdirectory.com/glossaries/glossary262.php

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SPG

Sync pulse generator. A source of synchronization pulses.
Found on http://www.zoo.co.uk/~z0001325/Glossary.html

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