The water tunnel and wind tunnel test on arrow aims to make clear the hydrodynam ics performance of arrows and to improve the technical know-how of archery movem ent.

This is a comparative study of ethnic Naxi and Han people in arrow culture through a comparison of symbolic marks and scripts in the light of rituals of reproduction,life,heresy and withch doctor,blood-relationship and religion.

Over the past decades,studies on bamboo ecology focus mainly on the structure,dynamics,productivity and regeneration of bamboo communities and its ecological functions in hydraulic and soil aspects.

Target tracking system in rocket launching;

Numerical simulation for the failure of connector bolts of rocket mid-stages;

Effect of paint coating on the internal thermal structure of rocket wing;

The Manufacture and Management of Bow and Arrow in Qing Dynasty;

Xinjiang Xibo Nationality s Arrow Culture Analysis;

It showed that the prevailing of arrow was the base for (developing) hunting into sports.

There are two traditional ways to determine the directions of the gears in common textbooks, one is the way of positive and negative sign, and the other is the way of arrow.