(1) The pressure handle is made wider, increasing the force area to reduce the pressure; (2) The staple (needle outlet) is very sharp and thin, reducing the force area and increasing the pressure; (3) The base is made wide, which is beneficial to reduce the pressure; (4) The stapler is a lever with a shaft…
The ball is used to directly contact the paper surface to generate friction when writing so that the ball rolls in the ball seat and brings out the ink or ink in the pen core to achieve the purpose of writing. A ballpoint pen is a pen that uses ink and different pigments to write.…
By color ⑴ Monochrome ballpoint pen: This is the most common ballpoint pen, often in blue, black, red, etc. ⑵ Two-color ballpoint pen: generally red and blue two-color. ⑶ Three-color ballpoint pen: red, blue, and black. ⑷ Four-color ballpoint pen: red, blue, black, and green. In addition to these four, there are six-color, eight-color, and…
