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Well, I'd have to ask whether he was intrinsically safe, increased safety or flameproof. Ex is not enough!
And with all those gaps into which ex-sparks might encourage a very non Ex spark I fear none of the above.
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David V
Lord Finchley tried to mend the electric light
Himself. It struck him dead and serve him right
It is the duty of the wealthy man
To give employment to the artisan
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