| 摘要 |
The waterproof walls 31a and 31b are provided on the upper portion of the front door 15, the waterproof wall 31a is arranged across both-side end portions of the front door 15 along the upper end portion of the front door 15 and the waterproof wall 31b is arranged in parallel with the waterproof wall 31a in a state of being spaced apart from the waterproof wall 31a, and the side plate 13a for the top plate is configured to cover the waterproof walls 31a and 31b to be spaced apart from the waterproof walls 31a and 31b.
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