齿形

Powder metallurgy gears include: bevel gear, dual-gear, gear box gears, planetary gears, ring gear, rack, sector gears, bevel gears, spur gears, sun gear, helical gear, gear shaft, flat gears, spur gears, double layer gear, synchronous pulley, helical gear, sprocket, ratchet, multi-gears, micro-gear, small modulus gear, special gear, differential bevel gear, reducer gears, variable speed gear motor, all kinds of precision gears.

粉末冶金齿轮包括：伞齿轮、双联齿轮、齿轮箱齿轮、行星齿轮、齿圈、齿条、扇形齿轮、锥齿轮、直齿轮、太阳齿轮、斜齿轮、齿轴、平齿轮、正齿轮、双层齿轮、同步轮、皮带轮、螺旋齿轮、链轮、棘轮、多层齿轮、微型齿轮、小模数齿轮、异形齿轮、差速伞齿轮、减速机齿轮、变速电机齿轮、各类精密传动齿轮。

It is helpful for the basically theoretical researches and the design of end face harmonic gear drive of oscillating teeth. And it has a definite application expectation and economic value.

关于活齿端面谐波齿轮啮合副的齿面方程及其修形的理论研究，奠定了活齿端面谐波齿轮减速器设计的理论基础，为这种新型传动装置的推广应用铺平了道路。

Leaves basal; leaf blade orbicular or reniform to broadly ovate-cordate, smaller at anthesis, 1.5-2.5 × 1.5-2.5 cm, gradually accrescent, to 4.5 × 4.5 cm, both surfaces sparsely puberulous or subglabrous, base deeply cordate, margin crenate, apex rounded or ± acute.

叶基生叶片圆形的或肾形的到宽卵形心形，在花期小的， 1.5-2.5 * 1.5-2.5 厘米，逐渐增大，达 4.5 * 4.5 厘米，两面疏生微柔毛或近无毛，基部深心形，边缘具圆齿，先端圆形的或多少锐尖。

Calyx campanulate to tubular-campanulate, straight or declinate, often dilated; limb equally or subequally 5-toothed or 2-lipped, upper lip 3-toothed, lower lip 2-toothed.

花有花梗。花萼钟状到管状钟状，直或者，经常扩大；同样瓣片或近相等5齿或二唇形，上唇具3齿，2齿的下唇。

Petioles acute-triangular in cross section, 5–20 cm, sheaths triangular-ovate; leaf blade triangular-ovate, 20–45 × 17–40 cm, 2–3-ternate-pinnate; leaflets subsessile or short-petiolulate, long-ovate to elliptic, 2.5–12 × 1–6 cm, base obliquely cordate to cuneate, margin coarse-toothed or serrate, apex acuminate, glabrous or hispidulous along nerves.

叶柄锐尖三角形的在横断面上，5-20厘米，鞘三角状卵形；叶片三角状卵形， 20-45 * 17-40 厘米，羽状2-3回三出；小叶近无柄或短的小叶柄，长卵形到椭圆形， 2.5-12 * 1-6 厘米，基部斜心形对楔形，边缘粗糙的齿或有锯齿，先端渐尖，无毛的或沿着叶脉具短硬毛。

The family is characterized by a primitive protrogomorphous-sciurognathous zygomasseteric structure and pauciserial incisor enamel, but the cheek teeth are precocious in development of hypocone and hypolophid.

共 4属 6种。新科的特征是：始啮型头骨-松鼠型下颌；门齿釉质层散系；颊齿具有发育的次尖和下次脊，后期种类上颊齿的外侧齿尖的唇侧发展成平凹到新月形。

Basal leaves 2-6, long petiolate; stipules over 1/2 adnate to petioles, broadly lanceolate, membranous, margin sparsely denticulate and ciliate or entire, apex acuminate; petioles 3-9 cm at anthesis, usually green, sometimes purplish, glabrous, nitid, elongated at fruiting to more than 20 cm; leaf blade glabrous on both surfaces or pubescent along veins, 3-sect, segments shortly stipitate, lateral segments deeply 2-fid, central segment deeply 2- or 3-fid, terminal lobes highly variable in shape and size, ovate-lanceolate, lanceolate, oblong, or linear-lanceolate, margin irregularly dentate or shallowly divided, sometimes triparted to pinnatiparted or 3-lobed, apex obtuse or acute.

基生叶2-6，具长叶柄；托叶超过1/2的贴生至叶柄，宽披针形，膜，边缘疏生细齿和具缘毛或全缘，先端渐尖；叶柄3-9厘米在花期，通常绿色，有时略带紫色，无毛，有光泽的，在果期拉长到超过20厘米；叶片两面无毛沿脉具短柔毛，3全裂，裂片具短柄，侧裂片2深裂，中裂片2或3深裂，顶裂片形状和大小极易变，卵状披针形，披针形，长圆形，或线状披针形，边缘不规则牙齿或浅裂，有时3深裂到羽状深裂或3浅裂，先端钝或锐尖。

Basal and lower petioles 4–7 cm, sheaths long and broad; blade oblong, 3–5 × 1.5–3 cm; pinnae 4–6 pairs, remote; ultimate segments ovate to ovate-lanceolate, 7–15 × 5–8 mm, entire or shallowly 2–3-toothed, base rounded-truncate or slightly cordate.

基部和下部叶柄4-7厘米，鞘长和宽的；叶片长圆形， 3-5 * 1.5-3 厘米；羽片4-6对，稀疏；末回裂片卵形的到卵状披针形， 7-15 * 5-8 毫米，全缘或2-3齿，基部圆形截形或稍心形。

Petiole 2-12 mm, white villous; leaf blade ovate to triangular-cordate, 2.1-6 × 1.5-4.2 cm, adaxially sparsely white pubescent, abaxially gray and densely white pubescent, base cordate to subtruncate, margin crenate-serrate, apex acute or rarely obtuse.

叶柄2-12毫米，白色长柔毛；叶片卵形心形到三角形， 2.1-6 * 1.5-4.2 厘米，正面疏生白色短柔毛，背面灰色和浓密白色短柔毛，基部心形到近截形，边缘具圆齿有锯齿，钝的先端锐尖或很少。

objectiveto seek a kind of effective surgical operation method to treat the buttock lax bymonofilament polypropylene synthetic nonabsorbable cogs thread.methods to research and analysis the 16 casesof buttock-pexy with liposuction, fat granule injection grafting, the reshape of muscular, musculoaponeurotic and cutaneous by monofilament polypropylene synthetic nonabsorbable cogs thread in recent 2 years.resultswhen we improved the uses of monofilament polypropylene synthetic nonabsorbable cogs thread in buttock-pexy plastic and aesthetic surgery, the scar complications reduced and the good effects received.

短跑途中跑臀部后坐跑动动作的形成因。。。目的：探讨应用单丝聚丙烯合成非吸收齿状线进行臀部松垂美容整形术。方法：对近两年16例应用单丝聚丙烯合成非吸收齿状线结合肿涨皮下吸脂技术、脂肪细胞转移技术、肌肉、筋膜及皮肤重塑技术进行臀部松垂美容整形术的应用进行总结与分析。结果：改进单丝聚丙烯合成非吸收齿状线应用方法后，臀部松垂美容整形术的瘢痕并发症明显减少，效果加强，外表瘢痕小。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。