| 摘要 |
PROBLEM TO BE SOLVED: To prevent a dissimilar material mixing accident upon supplying a liquid to a tank. SOLUTION: A liquid supply system 10 has a first liquid supply unit 20A supplying gas oil, and a second liquid supply unit 20B supplying ureal water. When the gas oil is supplied through a supply nozzle 32A of the first liquid supply unit 20A, the supply of the ureal water is started through a supply nozzle 32B of the second liquid supply unit 20B under the condition that the supply of the ureal water is started after the supply of the gas oil has been started. Since the supply of the ureal water is permitted under the condition that the supply of the gas oil has been started, such a dissimilar material mixing accident (contamination) as mistakenly supplying the ureal water to a gas oil tank can be prevented even without providing a liquid type sensor. COPYRIGHT: (C)2007,JPO&INPIT
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