This kind of tools mainly consists of lifting control system, safety joint, stabilizer, inner and outer barrels, full-closedcore catcher, and coring bit.
该工具主要由提升控制系统、安全接头、稳定器、内外筒、全闭式岩心爪和取心钻头等部件组成。
2
The core is a set which satisfies a system of weak linear inequalities, so it is closed and convex.
中心是一个满足弱线性不等式的合集，因此它是封闭的、凸的。
3
The resin sand with high collapsibility is chosen to make the core of the near closed hollow ring on the basis of many technological experimentations through analysis of structure and process.