First, according to the size of the nozzle, it can be divided into equal diameter cross and reduced diameter cross. The nozzle end size of equal diameter cross is the same. The size of the main pipe connecting pipe of the reducing cross is the same, while the size of the branch pipe connecting pipe is smaller than that of the main pipe connecting pipe.
Second, according to different manufacturing standards, it can be divided into national standard four-way, electric standard four-way, water standard four-way, American Standard four-way, German standard four-way, Japanese standard four-way and Russian standard four-way.
Third, according to the different production methods, it can be divided into jacking, pressing, forging, casting and so on.
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