The utility model relates to a common used low voltage appliance, that is the contactor of the permanent magnetic operational electric magnet combination.
本实用新型涉及一种常用低压电器，具体是永磁操动式电磁组合接触器。
2
Objective To evaluate the maxillary protraction appliancepermanent teeth combined rapid expansion of early bone anterior crossbite effectiveness.
目的评价前方牵引器联合快速扩弓矫治恒牙早期骨性前牙反牙合的有效性。
3
The utility model relates to a novel magnetic water drinking appliance, comprising a cup body and permanent magnetic bodies which are installed on a bottom part, a top cover and a cup wall.