pipe screwed fitting coupling

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coupling — /kup ling/, n. 1. the act of a person or thing that couples. 2. Mach. a. a device for joining two rotating shafts semipermanently at their ends so as to transmit torque from one to the other. Cf. clutch1 (def. 12a). b. a part with an inside… … Universalium
Hydraulic machinery — are machines and tools which use fluid power to do work. Heavy equipment is a common example.In this type of machine, high pressure hydraulic fluid is transmitted throughout the machine to various hydraulic motors and hydraulic cylinders. The… … Wikipedia
Nipple (plumbing) — This article is about the fitting used in plumbing and piping. For other uses, see nipple (disambiguation). In plumbing and piping, a nipple is a fitting, consisting of a short piece of pipe, usually provided with a male pipe thread at each end,… … Wikipedia

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