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Explanation: In the case of a pump, unless specifically part of equipment related to Oil and Natural Gas Extraction, it should be "stuffing/packing box" or "(stuffing) gland" The "valve gland" only applies to the Oil and Natural Gas Extraction-related "presse-étoupe"
English:Equipment (Oil and Natural Gas Extraction)
Petroleum Technology - Equipment
annulus seal s
valve gland s
English:Taps and Plumbing Accessories
stuffing box s CORRECT
packing box s
DEF - A packed, pressure-tight joint for a rod that moves through a hole, to reduce or eliminate fluid leakage. s