另外，充气式的设备，比如游泳圈或臂圈，只是玩具，不能把它们当做是可靠的救生设备，救生协会的娜塔莉·瓦利尔还补充说明：“这些设备很容易被扎破或者移除掉，这样便提供不了充足的浮力保证孩子的安全。”
Inflatable devices that fit around children's waists or arms are toys and shouldn't be regarded as reliable flotation devices, added Nathalie Vallieres, of the Lifesaving Society.
每个人都有一个自己的“气味圈”：大约从躯干起一臂的范围。
Everyone has a personal "scent circle" : approximately an arm's length from the body.
借助水平浮辊进行速度控制，可调护圈臂使该产品适合所有内部直径的产品。
Speed control is made with the aid of a horizontal dancer, and the adjustable retainer arm makes the unit suitable for all internal diameters.
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