转石（boulder）又称滚石，是指由基岩风化并受重力、水流等外力作用搬动而分布于山坡、谷底的大小不一的岩石、矿石碎块。
vt. float
misc. field stone
管状或中空管状的中心孔从地表到深石岩石层放满石头，以作为铁转的探头，作用类似今天的导管。
They stacked rocks with center holes (tube or doughnut shaped) from the surface to the deep stone layer as a guide for their drills (similar to today's guide tubes).
大多数同学都是这样写的：一直朝北走，到停车场的边上，看到“停止”的信号牌后，转左，朝前走，直到第三个加油站，转左，然后沿着这条街往下走，一直到看见一栋很大的、有一个绿色阳台的红砖楼为止，就向右转，再走，看到一个有栅栏的园子里的三个大的玄武石，然后向左……
Most of them were like this, "Head towards the north end of the parking lot and as you arrive at the stop light, turn left. Go until you see the third gas station and turn left on the next left.
本文介绍了应用于再造大理石成型机的液压激振系统，并提出了应用转间控制的系统其振动参数的合理选择方法。
This paper introduces hydraulic vibration-exciting system for marble moulding machine, and pats forward rational selection method of vibration. parameter for the system controlled by rotary valve.
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