笔有许多种.在这里,介绍一支中性笔. 这支中性笔长约14厘米,宽约1厘

There are many kinds of pens. Here, a gel pen is introduced. <br>This gel pen is about 14 cm long and 1 cm wide. Open the lid, there is an inner cover inside, and a metal pillar extends from the inner cover , This metal column is the nib. If you observe carefully, you will find that there is a small ball at the tip of the nib, which can be rolled. This is the pen ball. When writing, the pen ball will roll and bring out the ink attached to the paper. .But the pen ball is very fragile, as long as it is hit hard, it will make the pen ball unable to roll. So when using the gel pen, do not fall to the ground. <br>Unscrew the inner cap, you will see the full view of the pen. Holding the nib, pull out a slender tube from the pen. This tube and the nib are connected as a whole, called a refill. The refill is filled with ink, and the amount of ink determines the life of the refill. When When the ink is used up, the refill will be scrapped. <br>There is a cylindrical plastic hard shell on the outside of the refill, which is the pen sleeve. The inner cover is screwed on the pen sleeve. The pen sleeve has no life limit, and it can be used as long as it is not broken. Go on. When the refill is scrapped, just replace it with a matching refill. <br>When the pen is not in use, the pen cover will protect the nib from violent impact. There is a soft eraser in the pen cover. When the cap is closed, the soft rubber will press on the nib to prevent dust from entering the nib. On the cap, there is a recess that corresponds to the protrusion on the pen cap. This unevenness makes the pen cap firmly Covered on the pen sleeve. <br>Gel pen has many advantages. 1: Low price. It is not like a fountain pen. A good pen can cost hundreds or even thousands of dollars, while a good gel pen only costs more than ten yuan. 2: Weight Lighter. Much lighter than fountain pens. Fountain pens are generally made of steel, while gel pens are made of plastic. 3: Long use time. As long as you do not deliberately damage, a gel pen can be used for a long time by replacing the refill. 4: Use Convenient. If you use a fountain pen, you need to be careful when adding ink. If you are not careful, the ink bottle will be overturned, and the gel pen will not stain your hands.

There are many kinds of pens. Here, introduce a neutral pen. <br>The neutral pen is about 14 cm long and 1 cm wide. Open the lid, which also has an inner lid, and protrude from the inner lid a metal column, which is the pen mouth. If you look closely, you will find that the tip of the pen mouth has a small ball, can scroll, this is the pen beads, in writing, the pen beads will scroll, bring out ink attached to the paper. But the pen beads are very fragile, as long as they are hit hard, they will make it unable to roll. So don't fall to the ground when using a neutral pen. <br>Turn off the inner cover and you'll see the full picture of the inside of the pen. Take the pen mouth and pull a slender pipe out of the pen. This pipe is connected with the pen mouth, called the pen core. In the core is filled with ink, the amount of ink determines the life of the core. When the ink is used up, the core is scrapped. <br>Outside the core there is a cylindrical plastic hard shell, which is the pen case. The inner cover is screwed on the pen case. Pen sets have no life limit, as long as they are not broken, they can be used all the time. When the core is scrapped, just change the matching core. <br>When the pen is not in use, the pen cover will protect the pen mouth from a violent impact. There is a soft eraser in the pen cover, and when the pen cover is covered, the soft oak presses against the pen mouth to prevent dust from entering the pen mouth. On the pen cover, there is a dent that corresponds exactly to the bump on the pen cover. The bump secured the pen cover over the pen sleeve. <br>Neutral pen has many advantages.1: low price. It is not like pen, good pen hundreds or even thousands of yuan have, and good neutral pen only need ten yuan.2: light weight. Much lighter than pen pen generally made of steel, and neutral pen with plastic. 3: Long use time. As long as you do not deliberately destroy, a neutral pen can be used for a long time by changing the core.4: easy to use. If you use a pen, add ink, you need to be careful, accidentally will knock over the ink bottle, and the neutral pen will not soil the hand.

There are many kinds of pens. Here, we introduce a neutral pen<br>This neutral pen is about 14 cm long and 1 cm wide. When you open the cover, there is an inner cover inside. From the inner cover, a metal column is put out. If you observe carefully, you will find that there is a small ball on the tip of the pen tip, which can roll. This is the pen bead. When writing, the pen bead will roll and bring out the ink to attach to the paper. But the pen bead is very fragile, as long as it is hit hard, So when using a neutral pen, don't fall on the ground<br>When you take the ink from the inside of the pen, you can see the ink in the pen<br>There is a cylindrical plastic shell on the outside of the refill, which is the pen case. The inner cover is screwed on the pen cover. There is no life limit for the pen cover. As long as it is not broken, it can be used all the time. When the refill is scrapped, just replace it with a matching refill<br>When the pen is not in use, the pen cover will protect the pen mouth from violent impact. There is a soft rubber in the pen cover. When the pen cover is covered, the soft rubber will press on the pen mouth to prevent dust from entering the pen mouth. On the pen cover, there is a concave corresponding to the convex part of the pen cover. This concave convex part makes the pen cover firmly cover the pen cover<br>The neutral pen has many advantages. 1: the price is low. It's not like a pen. A good pen costs 100 yuan or even 1000 yuan, while a good one only costs more than 10 yuan. 2. It's much lighter than a pen. The pen is usually made of steel, while the neutral pen is made of plastic. 3. It takes a long time, When adding ink, you should be careful. If you are not careful, you will knock over the ink bottle, and the neutral pen will not stain your hands<br>