core barrel造句

1、Application of HZ308 Multi-function Core Barrel in a Gold Mine
HZ308多功能取心钻具在某金矿区的应用效果

2、A core bit is used to accomplish this, in conjunction with a core barrel and core catcher.
使用取芯钻头、取芯桶和岩心爪来完成取芯工作。

3、Type MQJ215 bit of closed type core barrel and its utilization
MQJ215密闭取心工具、钻头及工艺研究

core barrel翻译