This utility model relates to a pen which can write on the plane with stereovision effect, consisting of a pen point, a pen core and a pen tube.

本实用新型涉及在平面上书写出具有立体视觉效果字的笔，由笔尖、笔芯和笔管三部份组成。

youdao

After the ink tube is inserted in the pen head component, the seal film is broken by the convex tube upwards, ink flows into a pen point, and a user can write.

当储墨管插上笔头组件后，凸管顶破封膜，使墨水流向笔尖，即能书写。

youdao

BioMedicines of Emeryville, Calif. is testing its Omega interferon with a Duros pump, a titanium device that looks like the ink tube of a Bic pen.

FORBES: The Next HIV?

When the rubber sack makes contact with an object, whether a glass, a pen, or other hard item, a narrow inner tube sucks a small percentage of air out of the sack, making it contract and conform to the shape of the object it touches.

FORBES: Welcome, with a Nod to Robotics