Not all courses are cut out for hi-tech updates or outside speakers enabled by technology, of course. In quantitative areas, such as accounting, there is content that is perhaps better suited to memory and drill. 当然,最新科技或借助科技实现的外部嘉宾演讲,并不适合所有课程。在与数量有关的领域,比如会计学,有一些内容最好是靠记忆和练习。
Part of the crack is cut by drill, the crack surface is dust-colour under naked eyes. 钻孔截取裂纹局部,肉眼可见裂纹表面呈暗褐色。
Integral spiral heavy weight drill pipe is to extend the central upset of heavy weight drill pipe and to cut spiral groove on heavy weight drill pipe. 整体螺旋加重钻杆是在整体加重钻杆的中间加厚部位延长并铣削螺旋槽。
Always slip and cut the drilling line with the drill string in the cased hole and the bit is at or near the casing shoe. 滑大绳或者倒大绳时,一定要把钻具下到套管内,使钻头处在或接近套管鞋。
Diagonal cut rock drill plus bits cross-bladed chisel bit 对角十字形岩石钻头
Methods: Cut the contracture tract and extended the tendon to 32 cases of gluteus minimus with obliquity of pelvis and false unequal leg length, after surgery trained gluteal muscle contracture drill and pendular movement pelvis exercise. 方法:本组32例骨盆倾斜合并肢体假性不等长的患儿采用臀小肌松解延长手术,术后配合练习臀肌挛缩操和摆臀锻炼。
The paper focuses on the defined method of the blasting cut height, the selection rationale of drill and blasting parameters, the execution of the trial-blasting solution, the prime sequence, the pretreatment method and the corresponding safety precautions. 着重介绍了爆破切口高度的确定方法、钻孔爆破参数的选取原则、试爆方案的实施、起爆顺序的确定、预处理方法以及相应的安全防护措施等。