无齿

It is compared with involute gear most prominent advantage is that the process of meshing gear tooth profile surface there is no relative sliding, so no tooth wear, smooth operation, without the phenomenon of trapped liquid, low noise, long life and high efficiency.

它与渐开线齿轮相比最突出的优点是齿轮啮合过程中齿廓面没有相对滑动，所以齿面无磨损，运转平稳，无困液现象，噪音低、寿命长、效率高。

The expression of Bcl-2mRNA and P53mRNA in hippocampus after 16Hz, 130dB infrasound treatment In 1 day group, Bcl-2mRNA and P53mRNA were expressed lightly in CA1-CA3 areas in hippocampus and dentate gyrus. Blood vessels dilated lightly. In 7d group, Bcl-2mRNA and P53mRNA were more expressed in areas mentioned above. Dilation of capillaries and small vessels was more obvious. Bcl-2mRNA and P53mRNA were strong positive in endothelial cells of vessels. In 14d group, Bcl-2mRNA and P53mRNA expression was obviously increased in pyramidal cells of hippocampus and granular cells of dentate gyrus, showing deep blue staining. a The endothelial cells in some vessels were also strong positive for Bcl-2mRNA and P53mRNA. Dilation of capillaries and small vessels was lessened. In 21d group, Bcl-2mRNA and P53mRNA expression was decreased in pyramidal cells. In 28d group, little change about the expression and distribution of Bcl-2mRNA and P53mRNA was observed. Lots of Bcl-2mRNA and P53mRNA were scattered in cortex of temporal lobe around hippocampus and callosal gyrus area. Dilation of capillaries and small vessels was lessened obviously. The expression of Bcl-2mRNA and P53mRNA in hippocampus after 16Hz, 90dB infrasound treatment.

次声作用后Bcl-2mRNA和P53mRNA在海马的表达，16Hz、130dB次声作用1d组：两者在海马〓区和齿状回轻度表达，海马内血管轻度扩张；7d组：两者表达在上述区域较1d增多，微血管和小血管扩张较显，血管内皮细胞内可见呈强阳性表达的Bcl-2mRNA和P53mRNA；14d组：海马锥体细胞和齿状回颗粒细胞内Bcl-2mRNA和P53mRNA阳性表达明显增多，呈深兰色，在部分血管内皮细胞内两者强阳性表达，微小血管扩张状态较7d减轻；21d组：锥体细胞胞浆内Bcl-2mRNA和P53mRNA表达减弱；28d组：上述表达及分布与21d组相比无明显改变，海马周围颞叶皮层和扣带回区域亦可见大量散在分布的Bcl-2mRNA和P53mRNA表达，血管扩张状态已明显减轻。90dB次声作用1d-7d后，较对照组无明显变化，14d-21d后轻度表达，28d后，Bcl-2mRNA和P53mRNA表达较强。

Both upper and lower dental study models were collected from 30 boys (12 years old) and 30 girls (12 years old) with acceptable normal occlusion to understand the characteristics of the crown size, dental arch width and length such as (1) mesiodistal diameters of crown size from central incisor to first molar,(2) the width and length of dental arch and basal arch and (3) the morphology of dental arch form. After statistical analysis, data were compared with Japanese, Central and South American Indians and North American Caucasians from papers. The results were:(1) There was no statistical difference in teeth size between males and females, except the upper first molar of males was larger than that of females, lower central incisor of males was smaller than that of females.(2) The dimensions of dental arch of males were larger than that of females in general, especially such items as width and length of basal arch.(3) The crown size of Chinese male was in generally smaller than that of four other races, especially the upper canine, lower central incisor and first molar.

为了解住在台湾的中国人其牙齿的大小，齿列弓幅径及形态，为齿科人类学上的特微，以期能对儿童牙科，齿颚矫正科之临床及齿科基础医学能有所贡献，抽取12岁学童男女各30名共60名，可接受为正常咬合之上下颚齿列模型，测量其上下颚(1)左侧正中门牙到第一大臼齿共计12颗恒牙之牙冠近远心径，(2)齿列弓宽径、长径及齿槽基底宽径、长径，(3)齿列弓之形态，以上资料经统计分析作t-test检定，并与诸学者对日本人、北美白人、中美及南美印第安人人种的研究结果作检讨得知；(1)男女性恒牙的近远心径无明显差异，但男性上颚第大臼齿比女性者大，下颚正中门牙比女性者小；(2)男性的齿列弓幅径比女性者为大，尤以齿槽基底宽径及长径最显著；(3)国人男子的牙齿近远心径比其他四人种者为小，特别是国人的上颚犬齿，下颚正中门牙及第一大臼齿最小。

Leaves subsessile or lower ones with petioles 1-2 mm; cauline blade ovate to lanceolate to lanceolate-elliptic, spatulate near base, 1-2.5 × 0.5-1 cm, subglabrous with faintly strigillose margin and midvein, base cuneate to broadly so, margin denticulate with 3-9 teeth per side, apex acute to obtuse.

叶近无柄或下部的具叶柄1-2毫米；茎生叶卵形的到披针形到披针形椭圆，匙形的近基部， 1-2.5 * 0.5-1 厘米，近无毛微弱具短糙伏毛的具边缘和中脉，基部楔形到宽如此，边缘具小齿具齿每边3-9，先端锐尖到钝。

Petiole 8-20 cm, glabrous; leaf blade 5-7-foliolate; leaflets sessile, abaxially green, oblanceolate, 10-25 × 5-12 cm, abaxially glabrous or with sparse whitish hairs, ferruginous tomentose at base and in axils of lateral veins, base cuneate, margin crenate-serrate with teeth crenulate-serrulate, apex acuminate to subcaudate; lateral veins in 18-25 pairs.

叶柄8-20厘米，无毛；叶片5-7具小叶；小叶无柄，背面绿色，倒披针形， 10-25 * 5-12 厘米，背面无毛或者有稀少带白色毛的，被锈色绒毛在基部和在侧脉腋处，基部楔形，边圆齿状锯齿具细圆齿到细锯齿的牙齿，18-25对的侧脉。

This paper describes the concaved gear tooth profile after shaving resulting from the unbalance of cutting forces due to the variation of numbers of contact points acting on the teeth flanks, during backlash-free meshing engagement between the shaving cutter and the gear workpiece.

本文认为剃齿齿轮产生齿形中凹现象的主要原因是由于剃齿刀和齿轮在无侧隙紧密啮合过程中，因两侧齿面接触点数量的变化引起切削力的不平衡而造成的。

Main Products: ABBA linear guide, ABBA ball screw, HIWIN linear guide, HIWIN Ball Screw, THK linear guide / Ball Screw, XINHAN linear optical axis, IKO, THK, KMC linear bearings, NSB stainless steel linear bearings , APEX planetary reducer, a dedicated servo reducer, Japan Miki non-excited brake, clutch gear, special-purpose power / stepless speed regulation device Miki / Miki brakes, clutch and group body Miki dedicated servo coupling / engineering machinery dedicated joint coupling, ATLANTA worm gear reducer and a dedicated connection element, high-precision gear shaft, ATLANTA high-precision gears, ATLANTA rack and the rack and a straight body slide group, HSK screw support blocks, NOK seals, SAKACAMI seals, NAK seals, Taiwan gold cylinder, solenoid valve, gas control valve, mechanical valve, manual valves, pneumatic components, precision implementation of components and accessories, imported bearings such as NSK, SKF, INA; FAG; RHB; TIMKEN, etc..

主营产品：ABBA直线导轨、ABBA滚珠丝杆、HIWIN直线导轨、HIWIN滚珠丝杠、THK直线导轨/滚珠丝杠、XINHAN直线光轴、IKO、THK、KMC直线轴承、NSB不锈钢直线轴承、APEX行星减速机、伺服專用減速机、日本三木无励磁刹车、齿式离合器、专用电源/三木无级调速器/三木刹车、离合器及组体、三木伺服专用联轴器/工程机械专用联轴器、ATLANTA蜗轮蜗杆减速机及专用联接元、高精度齿轮轴、ATLANTA高精度齿轮、ATLANTA齿条及齿条与直线滑轨组体、HSK螺杆支撑座、NOK密封件、SAKACAMI密封件、NAK密封件、台湾金器气缸、电磁阀、气控阀、机械阀、手控阀、气动元件、精密执行元件及附件、进口轴承如NSK，SKF、INA；FAG；RHB；TIMKEN等。

Drum-shaped teeth coupling is inelastic coupling components, mainly by the ring gear and drum-shaped teeth, tooth bushings, and other major component parts.

鼓形齿式联轴器属于无弹性元件联轴器，其主要由内齿圈和鼓形齿外齿轴套等主要零件组成。

Peeling machines categories: 1400-9th gear without peeling machine cards Zamu 1400 me-no card Peeling NC-1400 XP-1400 Peeling no card-gear without peeling machine cards and automatic-manual Plug-woodworking machines that pick-up, tooth pick-up, comb machine, simple precision Panel Saw, is Chengzhao dealers across the country.

1400型第九代齿轮无卡旋切机 1400me型杂木无卡旋切机 1400XP型数控无卡旋切机 1400型齿轮无卡旋切机自动型和手动型木工插接机，指接机，齿接机，梳齿机，简易精密裁板锯，现诚招全国各地经销商。

It measured 25 feet from the tip of one wing to the tip of the other wing.

无齿翼龙身长有 6英尺，翅膀全张开的宽度有25英尺。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。