| 摘要 |
PROBLEM TO BE SOLVED: To simplify a means for closing a tube used for spraying hot water or steam for killing an insect pest, etc., of a field for culture of farm products at a specific position and stopping flow of the fluid by using a single component. SOLUTION: A stopper 10 composed of a first rod part 12, a second rod part 13 and a third rod part 14 extending in parallel in same direction from a base part 11 and being each longer than the lateral width of the tube 15 is put at the same height as that of the tube 15 and a tube 15 is put between the first rod part 12 and the second rod part 13 and a stopper 10 is reversed while interposing the tube 15 and the third rod 14 of the stopper 10 is pushed into the outside of the tube 15 to stop flow of the fluid in the tube 15. When the temperature of the tube 15 is lowered to the temperature at which human hand can touch, the stopper 10 is pulled from the tube 15 to make the fluid flow out. COPYRIGHT: (C)2003,JPO
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