1) parallel hole
平行孔
1.
The mining ways of controling the roof, cutting the bottom and making room-and-pillar are used as follows: cutting the roof in shallow holes, cutting the bottom and mining the middle layer of ore by making parallel holes upward from the bottom.
控顶切底房柱采矿法采用浅孔切顶、切底、上向平行孔回采中层矿石,改进切顶房柱法的部分工艺,省去下盘脉外底部结构,回采作业在中层矿石“悬臂梁”的保护下进行,适合于矿石稳固但下盘围岩松散破碎的缓倾斜矿体的开采。
2) parallel holes
平行孔系
1.
The principle of coordinate algorithm for machining parallel holes in box parts and the methods of keeping it′s accuracy;
箱体平行孔系加工的坐标法原理及保证加工精度的方法
3) parallel perforation
平行射孔
5) ?parallel moderate longhole
平行中深孔
6) a beam with two parallel holes
双孔平行梁
1.
Stress and strain distribution of a beam with two parallel holes, which is the key part of a sensor, is calculated by the FEM of elastic theory.
利用弹性力学有限元法对双孔平行梁式传感器的敏感元件进行应力应变分析,找出了应力应变的分布规律,在此基础上设计出一个量程为150N的传感器,并建造了一个小型实验台。
补充资料：第二孔(继发孔)型缺损
第二孔(继发孔)型缺损
ostium secondary defect
是心房间隔在形成上发生障碍，一般缺损较大，多在卵圆孔附近称第二孔(继发孔)型缺损。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条