The economical model of pipeline insulation is divided into single layer structure and double layer structure types.
保温管道的经济模型分为单层结构和双层结构两种。
The utility model has the advantages of effective filtering and washing combination, double-layer sieve filter, simple structure and high filtering quality.
本装置过滤与冲洗有效结合、双层筛滤、结构简单、过滤质量高、适用范围广。
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