| 摘要 |
PROBLEM TO BE SOLVED: To effectively shut off rainwater and sunshine depending on sunshine or other conditions, while solving the problems on a conventional canopy cover which can protect itself from rainwater but cannot effectively protect itself from sunshine so that the sunshine worsens working efficiency and gives no comfortable condition to an operator. SOLUTION: This canopy cover 8 for a turning drilling work vehicle comprises a roof 8a and side covers 50, 60, 70. At least the roof 8a has a variable surface area for effectively shutting off rainwater and sunshine. COPYRIGHT: (C)2003,JPO
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