This machine bed can pack to the head of clip-drill and the drills with many bore, making drill a hole more convenient.
本机床可装钻夹头和多孔钻座，使钻孔时更加方便。
2
Complete the design of the inner pack assembly of the down-hole blowout preventer. Accomplish the strength analysis and check of the easily worn parts.
完成了井下防喷器的内封隔总成部分的设计，并对易损件进行了强度分析及校核。
3
A battery pack including: a bare cell, a case to house the bare cell, having at least one hole formed therein;