huadejishu

  • Last seen last year
Gender:
Man 
Name:
Jianbin Fan
Location:
Shijiazhuang, Hebei, China
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huadejishu posted a new blog:

Proportional valves in hydraulic systems are classified according to their main functions, and are divided into four categories: pressure control valves, flow control valves, directional control valves, and proportional composite control valves. Each type can be divided into two structural forms: di…

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