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.
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.