| 摘要 |
A valve assembly is provided. The valve assembly includes a valve housing having an internal generally cup-shaped bore, a valve control cartridge inserted into the bore and having a rotatable control stem extending upwardly therefrom, and a bonnet nut threaded to an internal wall of the valve housing. The bonnet nut has a through channel that surrounds the control stem, and means are provided along the through channel to control a level of resistance to rotation of stem.
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