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A compressor stub is a compact pipe fitting characterized by its short length, simple structure, and ease of installation.

A boss is a structural or industrial component with a distinctive shape, widely used in various fields such as engineering, construction, and machinery.

A ball valve primarily consists of a valve body, a spherical closure member, a valve seat, and an actuating mechanism.

The cylindrical shell is a structural form widely used in various fields, and its length can be customized to meet specific requirements.