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GB 5771-86 Diesel engine fuel injection pump delivery valve assembly technical requirements
，关于柴油机喷油泵出油阀偶件的技术条件。
Injection pumps are among the greatest advancements in diesel engine fuel delivery systems. The primary purpose of an injection pump is to control the timing and quantity of fuel injected into the engine. Outlet valves play a key role in determining the para......
1039 
Nathan
The development history of various grinding machines
The History of Grinding Machines
Grinding machines have been around for centuries and have been used in various industries for shaping, grinding and finishing various materials. They have evolved from manual labor to sophisticated machinery and are now used in many different industries for a vari......
GB/T 4171-2000 Designation and chemical composition of high weathering structural steel
Introduction
GB/T 4171-2000 high-resistance structural steel is a higher corrosion resistance steel compared to ordinary carbon structural steel. Developed primarily for outdoor applications, it is suitable for use in machining, welding and bending parts and components. It is an important structu......
product technical standards
Technical Standard of Product
Introduction
Technical standards are formalized sets of criteria or specifications. They are developed and adopted to help improve product quality, safety and environmental practice, reduce trade barriers, and encourage interchangeability and compatibility of relate......
Gray iron castings (abstract) GB 9439-88
Abstract
GB 9439-88 is a national standard for gray cast iron parts. Gray cast iron is a type of cast iron which has an even surface and a dense microstructure with excellent mechanical properties and wear resistance. This standard specifies the requirements, test methods, acceptance criteria, ma......
Physical constants of steels commonly used in die casting molds
Die Casting Molds & Their Physics
Die casting is a metal-forming process used to produce precise and complex parts from a variety of alloys. The process is versatile, relatively inexpensive, and can be used for many production levels, from a few parts to thousands of parts per day. Die casting w......
Carbon copper castings for welded structures (GB/T7659-1987)
Carbon copper casting parts for welding structure (GB / T7659-1987)---------------------------------------------------------------------------------
Carbon copper casting parts for welding structure(GB/T7659-1987) are classified into three groups, General carbon copper casting, Copper-based alloy ......
Electrolytic manganese metal (YB/T051-1993)
Electrolytic Manganese
Introduction
Electrolytic manganese is a metal element obtained through electrolysis. It is a silvery-white, hard, and brittle metal with a specific gravity of 7.44. In its pure form, it is relatively non-reactive, but it also has a tendency to oxidize in the presence of a......
Japanese JIS mechanical structure steel designation system
，文章的内容：
Japanese JIS Mechanical Structure Steel Designation System
Steel has been used as part of the structure of mechanical structures since the invention of steel. It provides strength, durability, and versatility to a design and is widely used in many industries. In Japan, they have dev......
11SMn37 Purpose
Properties and Applications of AISI 1211 SMn37
AISI 1211 SMn37 is a low-carbon, medium-manganese grade of steel. It is used for both hot and cold forming, as it does not contain any lead. This high-strength alloy is formulated to give good wear resistance, increased tensile strength, and exceptio......
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