The column of drillbase is a trunk welding structure, and it is important to support the whole drill.
钻机底座立柱为箱形焊接结构，是整个钻机的支撑构件。
2
On June 11, 2005, a newly trained Iraqi soldier holds his weapon on his shoulders during a drill in East Fallujah Iraqi Camp, a base for recruits of the Iraqi armed forces.
2005年1月11日，在东伊拉克费卢杰营，伊拉克新兵将武器扛在肩上接受训练。
3
The following team defense drill is our favorite for reacting to each base running situation batted ball, bunt, steal, or rundown.