The common gear pump has such merits as simple structure, low cost, insensitive oil pollution, etc. but it has such demerits as high flow pulsation, unbalanced radial force, strong noise, etc.
普通齿轮泵具有结构简单、成本低、对油液污染不敏感等特点，但具有流量脉动大、径向力不平衡、噪声高等缺点。
Electromagnet has some nice features of itself, such as large force, simple structure, and low cost, etc.
电磁铁本身具有输出力大、结构简单、成本低等特点。
The utility model has the advantages of simple structure and low cost. The matching of dynamic force has high mobility. The utility model can be installed on various motor vehicles.
本实用新型结构简单，造价低廉，动力匹配有很大的灵活性，可以安装在多种机动车上。
The utility model has the advantages of simple structure and low cost. The matching of dynamic force has high mobility. The utility model can be installed on various motor vehicles.
本实用新型结构简单，造价低廉，动力匹配有很大的灵活性，可以安装在多种机动车上。
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