| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive method of verifying cleaning properties of the vessel. SOLUTION: The method comprises arranging a verification light source 41, instead of the nozzle, at the seat 7 of a spray nozzle for cleaning within a vessel where the nozzle is arranged during cleaning, during or after assembling the vessel, supplying electricity to the source 41 through a power source wire 42 to lighten and causing the power source to radiate a light flux 44 toward the inside wall of the vessel so as to verify cleaning properties of the vessel according to the conditions of the light flux 44 striking the inside wall of the vessel. Translucent sheets are attached over openings, e.g. tube connection nozzles 5 and 6 disposed in the upper paneling 2 of the vessel, and light is caused to irradiate the sheets so as to facilitate verification of cleaning properties of openings. COPYRIGHT: (C)2006,JPO&NCIPI
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