求翻译：本论文课题是设计闸阀的结构与工艺。闸阀主要由阀体、阀盖、闸板、阀杆、等装置组成。用它做启闭使用，并在全开时整个流道直通的作用。闸阀适用范围广泛，主要应用于石油、化工、电力、医药、火力等行业。是什么意思？

The thesis topic is the design of the structure and process of the gate valve. The gate valve is mainly covered by the valve body, gate, stem, and other devices composition. Do with it open and close and the entire flow channel in the fully open when the direct role. Gate valve wide scope of applica

This thesis is to design the structure and process valves. Main gate from the valve body, valve cover, flap, stem, and such. Use it to do the closing, and in the full open, the entire stream Road straight through. gate valves designed for a wide range, primarily for the oil, chemical, electrical, me

The present paper topic is designs the gate valve the structure and the craft.The gate valve mainly by the valve chest, the valve cover, the damper plate, the valve lever, and so on the installments is composed.Does with it opens shuts the use, and when all is opening entire flow channel nonstop fun

Subject of this thesis is the design of gate valve structure and process. Gate valves are mainly by the valve body, valve cover, gate, stem, and other installations. Use it for open and close, and when in full flow as a whole through the role. Gate valves for a wide range of mainly used in petroleum

正在翻译，请等待...