| 摘要 |
A first liquid fed into a first flow passage 6 of a fluid handling apparatus travels to the open end thereof on the side of a second flow passage 7 due to capillarity. The movement of the first liquid is uniformed on the cross section of the flow passage by the function of a capillarity promoting portion 220 or 230 of the bottom 21 of the first flow passage 6. Then, the movement of a second liquid fed into the second flow passage 7 is uniformed on the cross section of the flow passage by the function of the capillarity promoting portion 220 or 230 of the bottom 21 of the second flow passage 7. Thus, the movement of the front end of the second liquid is substantially uniformed to surely extrude gas from the second flow passage 7 to the outside via a fourth flow passage 10.
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