| http://www.w3.org/ns/prov#value | - Referring to FIGS. 16 and 17, there is shown a tricolor fluorescent in accordance with a second embodiment of the present invention which is similar to the above first embodiment except that an outer envelop 71 is shaped into a rectangular parallelepiped and that three pieces of tubular envelops 70R, 70G and 70B arranged in a row within the outer envelop 71, the bottom of which is hermetically sea
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