Construction
The construction of a mercury arc valve takes one of two basic forms: the glass-bulb type and the steel-tank type. Steel-tank valves were used for higher current ratings above approximately 500 A.
Read more about this topic: Mercury-arc Valve
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—Walter Benjamin (1892–1940)
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“No real “vital” character in fiction is altogether a conscious construction of the author. On the contrary, it may be a sort of parasitic growth upon the author’s personality, developing by internal necessity as much as by external addition.”
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