back-up filter的意思|示意

Frontier is the perfect 'just in case' back-up filter.

Frontier是理想的应急备用过滤器。

Another major source of EBSM waste water is the back flushing waste water of the anthracite filter, whose back flushing waste water for each time can be up to 150 ~ 200 tons.

装置废水的另一个主要来源是无烟煤过滤器的反洗废水，其每次的反洗废水高达150 - 200吨。

Carry the Frontier filter as a back up on multi-day backpacking trips in case larger pump filters clog or become damaged.

携带Frontier过滤器可作为多天背包旅行的备用，用于大型泵式过滤器阻塞或损坏后。

More importantly, your original air filter set-up will not be cut or damaged, making reverting back to original easy.

更重要的是，你原来的空气过滤器设置将不会被割伤或损坏，使恢复到原先的容易。