表面粗糙的

On the basis of establishing planar cutting model and cutting equation, through analyzing the rigidity of technical system infrequency chart, change cutting coefficient and the angle of cutter etc, emphasis measuring and analyzing hard turning 45 hardened steel the damaged layer of finished surface cutting force the roughness on finished surface and researching on the mechanism of wear and damage of cutter.

在分析二元切削模型和切削方程的基础上，进一步研究了切削变形及其影响机理；通过工艺系统刚性的频谱分析，改变切削用量、刀具几何参数等因素，测量并分析研究了精切淬硬钢的切削力、已加工表面粗糙度、加工硬化及表面残余应力及刀具的磨损情况，基本形成了精加工45~#淬硬钢的切削基础理论。

When the saturated vapor of pure R11 or R113 was condensed on the PF tubes under free convection conditions, the HTCs (based on the outside area of the base tube, the same be1ow) were 14 to 20 times those of the smooth tube because the condensate surface tension made the condensate film on fin surfaces thin and the rough saw-toothed fin surfaces disturbed the boundary layer in the condeneate film.

纯R11、R113的饱和蒸气在大空间花瓣形翅片管上冷凝时，由于凝液的表面张力将翅片表面上的液膜拉薄以及粗糙的锯齿形的翅片表面扰乱了凝液膜内的流动边界层，传热膜系数（以坯管外表面积为基准，下同）是光滑管的14—20倍。

According to the working procedure chart of theZH1105W diesel engine's gear cap analysis workpiece's precision, the surface roughness, thespecification, the processing spot size, the shape structure,material degree of hardness, the work piece rigidity and thedifferent of the components batch size to definite technique andtechnological process, determine aggregatemachine-tool's overall plan. Consider to theirregularity components but have high accuracy holes to beprocessing. So,"two holes at aface" is the best localization plan.

根据ZH1105W柴油机齿轮室盖的工序图分析其精度、表面粗糙度、技术要求、加工部位尺寸、形状结构、材料硬度、工件刚性及零件的批量的大小不同，确定被加工零件工艺方法和工艺过程，确定该组合机床的总体设计方案；考虑该零件表面结构的不规则性但有较高精度的孔需要加工，定位基准选择&一面双孔&是最佳的方法。

The potential-dependent SERS of the three pyridinecarboxylic acids (picolinic acid, isonicotinic acid, and nicotinic acid) on polycrystalline silver electrode are studied in this paper.

本文通过表面增强拉曼散射研究了三种不同构型的吡啶羧酸-皮考酸、异烟酸和烟酸在粗糙银电极表面上的吸附形态随电极电位的变化关系。

The potential-dependentSERS of the three pyridinecarboxylic acids (picolinic acid, isonicotinic acid, andnicotinic acid) on polycrystalline silver electrode are studied in this paper.

本文通过表面增强拉曼散射研究了三种不同构型的吡啶羧酸-皮考酸、异烟酸和烟酸在粗糙银电极表面上的吸附形态随电极电位的变化关系。

In short,the improvement of surface hydrophilicity is attributed to both the formation of polar oxygenous group and the increase of surface roughness.

可见，聚丙烯表面亲水性的提高来源于含氧基团数量的增加和表面粗糙度的增加。

RESULTS: Similar to the control, the cells in Jagged1 group displayed irregular shape with spiny or sheetlike dendrites and the cellular surface was rough. In contrast, the cells in DAPT group exhibited little dendritic processes and most of them were of round shape and with smooth surface.

结果： 与对照组相似， Jagged1组的细胞形态不规则，伪足分化和突出的片状结构较为明显，且表面粗糙；相反， DAPT组细胞的伪足不明显，多数细胞趋于圆形，表面相对光滑。

Bearing ring rotating components of the noodle and roll surface roughness is usually 1 / 10 μm, so a smooth surface of the pollutants is very sensitive to damage.

轴承环转动面和滚动元件的表面粗糙度通常为1/10 μm，如此光滑的表面对污染物造成的损坏非常敏感。

One kind of PCD boring tool and a fine adjustment boring bar,which are suitably used in precision finishing the surface of pinhole of combustion engine piston,are introduced.

介绍了一种适用于发动机活塞销孔表面精镗加工用聚晶金刚石镗刀和可微调刀具尺寸的精密微调镗杆，该镗刀和镗杆组合具有较高的加工精度和表面粗糙度精度以及调整方便、使用寿命长的特点。

Accurate control and fabrication of silicon surface structures from atomic scale to micrometer scale,which may be randomly associated with surface roughness or have well defined patterns,is critical for the per-formance and reliability of electronic devices.

从原子水平到微米尺寸，准确控制硅表面结构的精密加工，诸如无序的表面粗糙或者精细的图案，乃是电子元件性能及其可靠性的保证。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。