They can also be used to modify viscosity in ball pen printing ink.
也可在圆珠笔油墨中作调节粘度用；
The trouble and the waste caused by abandoning the core of the ball pen and changing a new one without using up the ink are avoided.
避免了圆珠笔总是笔油用不完就要将笔芯弃旧换新，而带来了麻烦和浪费。
Finally the rubber, the ordinary rub out the pencil, eraser, can only and it can also erase pen, ball-point pen, such as a variety of ink.
最后是橡皮了，普通的橡皮只能擦掉铅笔字，而它还能擦掉钢笔、圆珠笔等多种墨迹。
The company mainly produces roller-tip pens, ball point pens, Gel ink pen white board marker permanent marker, mechanical pencil and other stationeries.
公司主要生产水性笔、中性笔、圆珠笔、白板笔、记号笔、活动铅笔等文化用品。
Although China was the major manufacture of ball-point pens in the world, the gel pen ink which was in high technology is still rely on importing so far.
我国已成为中性笔的生产和销售大国，但技术含量较高的中性墨水仍主要依赖进口。
Although China was the major manufacture of ball-point pens in the world, the gel pen ink which was in high technology is still rely on importing so far.
我国已成为中性笔的生产和销售大国，但技术含量较高的中性墨水仍主要依赖进口。
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