Double triangle boom is a kind of directly positioning mechanism, it can remove the drill rod to a target position directly in its operating range.

双三角钻臂属于直接定位钻臂，在工作区间可将钎头直接移位到目标位置。

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We adopted the precision cold drawn, honing and polishing to manufacture the precision Slender Shaft (Piston Rod), every technical target is over the national standard.

我公司专业生产精密细长轴(活塞杆)采用精密冷拔、精磨和高精度抛光的先进工艺制造，各项技术指标均符合并超过国家标准。

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In study of the penetration of a segmented rod with aluminum carrier tube into semi infinite steel target, we present a simplified model of based on hydrodynamics and penetrating mechanics.

该文通过对带铝套管的分段弹侵彻半无限钢靶的研究分析，以流体动力学和侵彻力学为基础，提出了一个分段弹垂直侵彻半无限厚靶的简化模型。

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