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A ball-point pen - mine with pressurized pastensaeule
A ball-point pen - mine with pressurized pastensaeule
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机译:一支圆珠笔-带有加压帕氏针的矿用笔
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摘要
A ball point pen cartridge capable of being pressurized in a pressure vessel including an end stopper having an enlarged section shaped to seal the end of a cartridge tube, a narrower section connected to the enlarged portion and extending into the cartridge, an axial tube running completely through the enlarged section and partly through the narrower section, a radial tube in the narrower section that intersects the axial tube and a flexible, gas impervious tube surrounding the narrower section to form a check valve with the radial tube.
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