| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem of a window component provided in a cover, comprising a transparent and colorless plate material, requiring a periodical replacement for securing the visibility, stopping a machine for every replacement, and causing a reduction in the productivity. SOLUTION: The cover 5 is provided with the opening part 22 and a plurality of eaves plates 23 extending from the opening part 22 to the inside of the machine are provided in parallel to each other. This constitution can prevent coolant from dispersing outside the machine and at the same time secure the visibility of the inside of the machine for a long period of time. COPYRIGHT: (C)2003,JPO
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