The utility model relates to an electricity-saving device of an electromagnet, which carries out retention by alternating current.

本实用新型涉及一种以交流吸持的电磁铁之节电装置。

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Intrauterine device (IUD); Perimenopausal period; Retention; Safety.

宫内节育器；围绝经期；滞留；安全性。

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The apparatus permits easy and quick attachment (and removal) of the portable device to an object (i. e., the belt) while providing secure retention when not in use.

该设备允许便携式装置与物体(如腰带)的简易和快速的装接(和移动)，而又可以在不使用时提供牢固的夹持。

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The apparatus permits easy and quick attachment (and removal) of the portable device to an object (i. e., the belt) while providing secure retention when not in use.

该设备允许便携式装置与物体(如腰带)的简易和快速的装接(和移动)，而又可以在不使用时提供牢固的夹持。

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