铰孔是孔的精加工手法之一.Reaming is one of the finish machining methods of hole.铰孔或攻丝时,不要用力过猛, 以免折断铰刀或丝锥.Do not overexert when reaming holes or threading, lest breaking off the reamer or the tap.点位系统适用于钻孔 、 锪 孔、扩孔 、 铰孔 、 镗孔 、 攻丝等孔加工...
悲观的人,即使走在平坦的大道,也会被小石子绊跌.The pessimist stumbles over pebbles even on a wide and well - paved road.少年人扛磨石, 孩童背木柴,都绊跌了.Young men toil at the millstones; boys stagger under loads of wood.不一会儿他绊跌到捕熊人设的陷阱里.In a moment he stumb...
他们沿校墙挖沟.They dug a dike along walls of the school.挖沟以排水.Dig trenches to drain away the water.他们挖沟以阻止森林大火蔓延.They dug trenches to keep the forest fire from spreading....