人体秤使用一段时间后，往往出现指针不回零的问题，并且随着频繁使用，指针不回零的程度就越大。尽管在称量前将指针调至零位，但称量后指针仍不能回零。程度大的根本不能将指针调到零位。产生指针不回零的原因是弹簧的永久性变形。人体秤称重，是通过弹簧的弹力平衡人体... After using the scale for a period of time, the problem of non-zeroing of the pointer often occurs, and the degree of non-zeroing of the pointer increases with frequent use. Although the pointer is adjusted to zero before weighing, the pointer can not be returned to zero after weighing. To a large extent can not transfer the pointer to zero. The reason that the pointer does not come back to zero is the permanent deformation of the spring. Weighing the human scale, is the spring balance of the human body ...