磨尖

Methods 20 fresh extracted,same size in mesiodistal and height of cusp,1st up premolars were taken for this study.

磨除近远中邻面，使之近远中径为 4mm ，在颊牙尖釉质层下制备 4mm× 4mm× 3mm的洞型并随机分成两组。

Objective: To explore valuable methods and landmarks for locating cochlea, and provide anatomic data for drilling petrous pyramid during the middle cranial fossa approach.

目的：探讨耳蜗的定位方法和定位标志，为颅中窝手术入路中磨除岩尖及耳蜗在颅底外科的临床应用提供解剖学资料。

objectivethe aim of this study was to evaluate the curative effects of the modified fixed reverse twin-block appliance combine edgewise on treatment of adult angle ⅲ anterior crossbite.methodsthe appliance was used on 15 adult subjects with angle ⅲ malocclusion and then compared clinical character and x-ray cephalometry before and after treatment.resultsafter 4 months treatment the appearance and profile were improve evidently, mandible retrusion was to lead molar and canine were angle i,overjet and overbite were normal.

目的：应用改良固定反式双阻板矫治器（twin-block appliance，tba）联合方丝弓技术矫治成人angleⅲ前牙反牙合，为成人前牙反牙合提供新的治疗方法。方法：矫治成人患者15例，进行临床表现及相关硬组织测量。结果：固定反式tba戴用4个月后下颌明显后退。所有患者在未拔牙的情况下前牙反牙合均得到有效治疗，磨牙及尖牙均达到i类关系。但上颌仅为牙及牙槽的代偿性变化。

The Optimized Design and Reshaping of Profile of Skiving Cutter with Plane Flank for Gleason Gear

由于弧齿锥齿轮尖齿刮削刀盘的切削刃采用斜角直线造形法，其造形误差和重磨误差大，本文提出了优化造形的方法。

Magic eye is used to control the position and symmetry of sharp angle blunted tool.

4由电眼控制的磨钝尖角的工具的位置和对称性。

As hounds and lusty youths set upon a wild boar that sallies from his lair whetting his white tusks- they attack him from every side and can hear the gnashing of his jaws, but for all his fierceness they still hold their ground- even so furiously did the Trojans attack Ulysses.

像一群猎狗和精力充沛的年轻人，围住一头野猪，猛扑上去，而野猪则冲出茂密的灌木，它的窝巢，在弯翘的颚骨上磨快了雪白的尖牙利齿，狗和猎人从四面冲来，围攻中可以听到獠牙咋咋的声响――然而，尽管此曾来势凶猛，他们却毫不退让。

Ln this factory main production the small series jaw typebreaker,the hammer type breaker,the ball mill,mix thepytty to grind,v,the U minecar,the elevator,the conveyer and the correlation wea-resistngfitting and the mechanicai shovel,the excavator,the power shovel16

本厂主要生产中小系列鄂式破碎机、锤式破碎机、球磨机、混泥碾、V、U型矿车、提升机、皮带运输机及相关耐磨配件和铲车、挖掘机、电铲（16立方米、10立方米、4立方米）配铲尖、斗齿、斗提梁以及各种铸造磨球近120多个品种。

The posterior length of the dental arch changed significantly (P.001). The maxillary and mandibular arch shapes didn't change before and after treatment.

结果：上、下牙弓宽度在矫治前、后有显著差异(P.05)；上、下牙弓长度治疗前、后尖牙长度变化不明显，而第一磨牙长度具有显著性差异(P.001)；治疗前、后，上、下牙弓形状无明显变化。

Basic structure and operation principle of the parallel grinder for helical drill point grinding is presented.

给出螺旋面钻尖刃磨机床的基本结构及其工作原理。

The paper discusses the principle of automatic loading and unloading system of CNC drill point grinder,and design an reliable PLC controlling system through analyzing the mechanism and the process of load-ing and unloading.

论述了数控钻尖磨床自动上下料机构的原理，通过对上下料机构及过程的分析，设计了一种合理可靠的自动上下料及刃磨的PLC控制系统。

In this paper, the requirement analysis, design and implementation of the system are introduced in detail.

此论文详细介绍了系统的需求分析，系统设计和具体实现。

In the context of economic globalization is increasingly deepening, China's economy can not be spared.

在经济全球化日益加深的背景下，中国经济不可能做到独善其身。