| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilator for a ventilation control panel for agriculture, having a simple structure free from raining in even in a ventilation operation in a rainfall. SOLUTION: This ventilator for a ventilation control panel for agriculture has a double window structure of an outside window 1 and an inside window 2. The outside window 1 and the inside window 2 are opened outside and inside around different upper and lower supports 3 and 4, respectively. The outside window 1 and the inside window 1 are equipped with opening and closing gears and opening and closing are synchronized by an opening and closing driving shaft in an opening and closing driving. |
