钻机

During the construction ,in order to protect the large interim services such as trestle bridge,steel protective casing and double-walled steel cofferdam,static ice pressure and dynamic percussive force were eliminated from water by use of various methods.

在建桥过程中，栈桥和钻机平台桩基、钢护筒、双壁钢围堰等大临设施采用活水圈、人工破冰、破冰船破冰及吊挂软物体等方法消除了静冰压力，利用爆破法破冰，消除了动冰的撞击力。

Placing a small amount of mixed material on a tooth prepares it for filling without subjecting the patient to the discomfort we all associate with the dentist's drill.

投入很小量的混合药剂到牙齿做准备，可以消除病人的不适感，缓解病人全神注意着牙医的钻机时的紧张情绪！

It differs from the telltale tap-tap of the Texas rig.

它不同于跟塔-塔的德克萨斯钻机。

Study engineering drawings and blueprints, determine the materials required, and plan the sequence of tasks to cut metal most efficiently · Construct patterns and templates as guides for layouts · Lay out reference points and patterns on heavy metal according to component specifications · Rig, hoist and move materials to storage areas or within worksite · Assemble and fit metal sections and plates to form complete units or subunits using tack welding, bolting, riveting or other methods · Set up and operate various heavy-duty metal-working machines such as brake presses, shears, cutting torches, grinders and drills, including computer numerical control equipment, to bend, cut, form, punch, drill or otherwise form heavy-metal components · Install fabricated components in final product.

研究机械制图和图纸，决定所需材料，并计划工作顺序，有效地切割金属。 2。构建模式和模板作为布局向导 3。按照组件规格在重金属上设计参考点和模型 4。装备、起重机和运输材料入库或在工地场内 5。组装和安装金属部件和板材形成全套装置，或通过点焊、螺栓连接，铆接法或其他方法形成次单元。 6。建立并操作各种重金属加工机床，例如压弯机、剪床、割炬、磨钻机，包括数控设备，压弯、切割、成型、打洞、钻孔，或相反形成重金属组件。 7。在成品上安装已制造好的组件 Structural metal and platework fabricators and fitters 结构金属和板金加工制造工和安装工

The mean value of work loads on a shaft bearing of swivel and rotary table is determined by basic principles of fuzzy theory, considering the loads' fuzziness and the requirement for reliability.

考虑钻机水龙头和转盘主轴承工作载荷的模糊性及可靠性要求，应用模糊数学基本原理求得平均计算载荷，从而计算出主轴承的模糊可靠性寿命。

The variable load operating mode of the rotary table and swivel was transformed equivalently into stable load operating mode, and the equations for calculating the equivalent weig...

即将转盘和水龙头主轴承由变载荷工况向稳定载荷工况作等效转换，从而导出等效当量动载荷Pm 的计算式及主轴承寿命估算公式，并以 40 0 0m深井钻机水龙头主轴承为例，进行了疲劳寿命的估算

Turning the dish drives to usually adopt the machine method,because the machine drives of spreading and moving the chain is long,spreading to move the parts many,spread to move the device complicated,on the some special artesian well equipments,will often appear whole machine set arrange the difficult circumstance,and host weight over big,affect the host moves to carry function.

0前言转盘是钻机或修井机旋转系统的主要部件，把发动机的旋转运动通过减速机构变为垂直旋转运动。转盘驱动通常采用机械方式，由于机械驱动的传动链长，传动部件多，传动装置复杂，在一些特殊的钻井设备上，常会出现整机台面布置困难的情况，且主机重量过大，影响主机的移动性能。

Perhaps one of the best places to utilize the split shot rig is on bare or nothing banks.

或许最好的地方之一，利用分裂或裸露镜头钻机是什么银行。

The split shot rig is less affected by wind because you are constantly moving it.

钻机分裂枪击受风力较小，因为你不断移动。

Not Just Another Carolina rig The Split Shot may resemble a Carolina rig but it is different.

不仅仅是另一卡罗莱纳造分裂枪击可能类似于一个卡罗莱纳钻机但不同。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。