| 摘要 |
PURPOSE: A pressure-resistant chamber is provided to efficiently utilize inner space as working space. CONSTITUTION: A chamber frame(1) has an opening space(10) of a quadratic section shape at an inner portion thereof, and plural reinforcing frames(2) are installed at an external side of the chamber frame. A chamber body(3) is installed at an opening space of the chamber frame. The rest portion except the upper portion is plugged up. A pressure seal member is installed between the opening space of the chamber frame and the chamber body. |
