How a Retractable Ballpoint Pen Works
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9 سال پیش
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A click pen has several
A click pen has several parts to it: the frame, a thruster, two cams, a guide pin, a spring, an ink cartridge with ink, a ballpoint at the end of the cartridge, and other parts that may vary. The spring provides the tension required to retract the ink cartridge.
9 سال پیش
در تاریخ 1394/07/12 منتشر شده
است.
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