EN71-1 4.18 Aquatic toys
1) All air-inflation inlets shall have stoppers permanently attached to the toy. When the toy is inflated, the stopper shall be capable of being pushed into the toy so that it does not stand more than 5 mm from the surface of the toy.
这句话中,stopper 和 surface of the toy 的距离是怎么计算?
是按如图的方法吗?