串联电阻法与双线圈换接法是两种提高直流电磁开关返回系数的常用方法。
In this paper two methods to elevate the return factor of the d.
双线圈收口机结构简单、使用灵活、操作方便、外型美观、经久耐用。
This machine structure is simple, flexible, and user - friendly operation.
双线圈收口机结构简单、使用灵活、操作方便、外型美观、经久耐用。
This machine structure is simple, flexible, and user-friendly operation.
装订耗材：胶线圈，双线圈，铁单线圈，胶索膜等。
Binding consumables: plastic wire, double wire, iron spiral wire, plastic index film and so on.
装订耗材：胶线圈，双线圈，铁单线圈，胶索膜等。
Binding consumables: plastic wire, double wire, iron spiral wire, plastic index film and so on.
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