| 摘要 |
PURPOSE:To ensure the sealing property with a simple form without increasing the number of part items, and sufficiently enhance the strength. CONSTITUTION:The fluid supply and discharge port 3 of a resin vessel 1 is constituted in the form where a substantially cylindrical metal base 10 is buried in a resin, a tapered female screw 10A is formed on the inner surface of the base 10 in order to connect a fluid supply and discharge pipe 11, and a female screw 9A is formed on a partial circumferential surface of a communicating hole 9 formed in the resin continuously to the female screw 10A formed on the base 10. |
