先进的三段式长度计数，确保卷取长度精准。
The advanced three-stage length count, to make sure the accuracy of the rewinding length.
延长舒服(只要最小的阻力)1.8米返回天然-自我卷取(即承包春季)运用后只是7.62厘米到一个松散的全体长度。
It extends comfortably (with only minimal resistance) up to 1.8m and returns naturally - self coiling (i. e. a contracting spring) to a compact overall length of just 7.62cm after use.
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