ejector tube; ejector housing (revolver)
Specialized firearms terminology referring to the part of a revolver that houses the ejector mechanism. Extremely rare outside of technical or historical contexts.
See also: 蹴子覆
In the blueprints of old handguns, the part name 'ejector tube' is written.
Another rare revolver part term; 排莢桿筒 is the ejector tube/housing, while 蹴子覆 refers to a different component (ejector rod housing cover).
A technical compound formed from 排 (expel), 莢 (pod/shell, here referring to a cartridge case), 桿 (rod/lever), and 筒 (tube/cylinder). The exact historical derivation is uncertain; it is a specialized term likely coined for firearms manuals.