| 摘要 |
PROBLEM TO BE SOLVED: To provide a breakthrough ventilator.SOLUTION: A ventilator comprises a cylindrical part 1 provided at a ventilation hole part 31a of a wall 31, and a ventilation part 2 provided at the tip part of the cylindrical part 1. In the ventilator, a net body 3 closing a base end opening edge part 1a is detachably provided at the base end opening edge part 1a of the cylindrical part 1.SELECTED DRAWING: Figure 1 |
