| 摘要 |
PROBLEM TO BE SOLVED: To heighten insulation effectiveness of a sealed cover device of a machine tool.SOLUTION: Double panel structure prefabricated materials b1, b2, b3, b4, c1, c2, c3, c4 having a cavity part v in the middle by combining a front panel member p1 and a rear panel member p2 are used as prefabricated materials constituting a sealed cover device 10. |
