6 as for all machined surfaces without protective paint, metal protector or grease should be applied to avoid serious rustiness.
6对于所有机械加工的未涂防护漆的表面，应涂上金属防护剂或油脂，以防严重生锈。
The article introduces property and installation of new motor general protector with electronic re - lay substituting for double metal plate relay.
介绍以电子式热继电器取代双金属片式热继电器的新型电动机综合保护器的性能特点以及安装接线方法。
The article introduces property and installation of new motor general protector with electronic re - lay substituting for double metal plate relay.
介绍以电子式热继电器取代双金属片式热继电器的新型电动机综合保护器的性能特点以及安装接线方法。
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