It is possible to use an ink bag instead of an ink absorber for pens. This is related to the design structure of the pen.
A pen is a writing instrument mainly made of metal. It contains ink (mostly black or blue) through a hollow pen tube, and then writes through a duckbill pen through gravity and capillary action. It can be said that it is a writing tool of western calligraphy.
"A" How to query the qualifications of engineering survey enterprises
Jianshetong website can query the qualifications of engineering sur