| 摘要 |
A cap (10, 110) has spectacles (20, 120) which can extend down from, or be retracted to be against the underside of, the peak (12, 112). Arms (23, 123) on the spectacles (20, 120), are hingedly mounted on mounting blocks (25, 125) and complementary teeth (37, 33/137, 133) allows the spectacles (20, 120) to be positioned at a range of different positions relative to the peak (12, 112).
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