查询词典 pack drill

It is considered that fatigue crack is early produced on drill pipes, because the vibration load of drilling tools in air drilling is more severe than in mud drilling. Fatigue cracks easily occur under alternating vibration. Because the current wellhead detecting instruments can not be used to reflect the change of pump pressure produced after drill pipe piercement timely and accurately, effective measures can not be taken in time to prevent the expansion of fatigue cracks. As a result, drill pipe fracture accidents occur.

失效分析表明，钻杆属于早期疲劳断裂，断裂主要原因是在空气钻井过程中钻具受到的震动载荷远大于钻井液钻井过程中的震动载荷，在交变的震动载荷作用下，钻具容易产生疲劳裂纹；由于现有的井口检测仪表不能精确及时反映钻杆刺穿之后产生的泵压变化，无法及时采取预防措施，疲劳裂纹不断扩展，最终导致了钻杆断裂失效。

The invention relates to a desk type drill machine for preventing drill head wreckage, comprises chassis, supporting post, operating board covered in middle of supporting post, cabinet and generator; cabinet is equipped with tension pulley pressure sensor, belt tension unit and pressure foil gage; tension pulley is compacted on driving belt of drill machine, pressure foil gage is installed on top bar of tension pulley, the pressure foil gage is in electric connection with input end of controlling circuit, output controlling end of controlling circuit is connected to power input end of generator.

本发明是防止钻头折断的台式钻床，包括底座、支柱、套在支柱中部的工作台、以及机箱和电机，机箱上设有张紧轮压力传感器，由皮带张紧装置和压力应变片组成，其中的张紧轮紧压在钻床的传动皮带上，压力应变片设在张紧轮的顶杆中，压力应变片与控制电路的输入端电连接，控制电路的输出控制端连接在电机的电源输入端中。

When I purchased my new torch I also got an 1-1/16" drill bit with a morse taper on the end. I had to turn the taper off as my drill press would not accept this size. I turned it down to just over 1/2" in order to fit it in my drill chuck.

当我购买了我的新的火炬，我也得到一个1-1/16 &钻头与摩士锥度就结束，我已经把锥度小康作为我的钻床不会接受这样规模的，我把它下降到刚刚超过1 / 2 &，以适应它在我的钻夹头。

HSS twist drill, woodworking drill, masonry drill, tap, diamond disc, power tools and BI-metal hole saw.

3A17 各种高速钢麻花钻，木工钻，建工钻，丝锥，锯片，电动工具，双金属孔锯。

The adjustable stop has a drill bit engaging mechanism to selectively lock the adjustable stop the drill bit at a desired location to limit the dept that the drill may penetrate into the bone.

这种可调限位件具有钻头接合机构，用以将可调限位件选择性地锁定在钻头上的所要求的位置，以限定钻头穿入骨头的深度。

The results showed that the performance of the drill pipe joints was in line with standard and the main reason was that the making up torque was inadequate.Drill pipe joints in underground unrestrained tightening-up caused the drill pipe joints to bear the excessive load more than their anti-torque yield strength.

结果表明：钻杆接头的各项性能指标均符合标准规定，失效的主要原因是上扣扭矩不足，钻杆接头在井下无节制旋紧，致使钻杆在井下的自上扣扭矩超过了钻杆接头的实际抗扭屈服强度。

Those swimmers who have great sculling capability may practice the drill or choose to practice the drill or any section of the drill with the sculling position at the front.

对于小划手技术很好的选手可以选择手在前方作小划手的方式就本项练习或本项练习的任何部分进行训练。

Meters liquid presses drill machine is mainly used to drill to explore various depth as 200 meters any kind of angle of bore . It can drill a hole in the rock of different degrees of hardness. Drilling a hole in the coal seam, soft rock and in the farmland beat the well time and limited efficacy rate .

200米液压钻机主要用于钻探各种深度为200米左右的各种角度的各类用途的孔，可在不同硬度的岩石中钻孔，而在煤层、软岩石中钻孔以及在农田打井时效率最高。

I like very much in evening to go to the drill ground of the school up, a person, a pack of dried melon seeds, stroll, at this time of person of the drill ground is not just a lot of, that time, the morning of everyday will have a lot of classmates to come the take exercise here, that just is the most beautiful time.

我很喜欢在晚上到学校的操场上，一个人，一包瓜子，散步，这时的操场上人还不是很多，到了那个时候，每天的早晨就会有很多的同学来这里锻炼，那才是最美的时候。

The sheep trucks and horse trailers unloaded at the trailhead and a bandy-legged Basque showed Ennis how to pack the mules, two packs and a riding load on each animal ring-lashed with double diamonds and secured with half hitches, telling him,"Don't never order soup. Them boxes a soup are real bad to pack." Three puppies belonging to one of the blue heelers went in a pack basket, the runt inside Jack's coat, for he loved a little dog.

卡车和马车把羊群卸在路口，一个罗圈腿的巴斯克人教埃尼斯怎么往骡子身上装货，每个牲口背两个包裹和一副乘具——巴斯克人跟他说"千万别要汤，汤盒儿太难带了"——背篓里放着三只小狗，还有一只小狗崽子藏在杰克的上衣里，他喜欢小狗。

The use of the web to spread fears that flicking the switch on the LHC could create a Black Hole that could swallow up the Earth particularly concerned him, he said.

他说，使用互联网散布恐慌说启动LHC会生成一个可能吞噬地球的黑洞的做法让他感到忧虑。

Not a single word have I written down.

我一个字也没有写下来。