凹形

This paper studied the case that there is a known point of tangency of a circle and a parabola while the center of the circle is on the recession of the parabola.

应用数形结合的方法，研究了已知圆与抛物线有一个切点，而圆心在切点处抛物线的凹向的情形。

PM Injection Molding / Precision Casting structural components include : Sleeve Bearing, oil bearings, bushings, flanged connecting sleeve; Double gears, bevel gear, gear, Pulley, synchronous wheel, sprocket, AK47 toy gun gear, various micro-precision gear drive; PM microporous filters, filter tubes, mufflers and filtration materials, Copper filters, stainless steel trap; mixer blades, coffee machine cutter heads Soymilk Machine grinding pieces Juicer blades, Juice blades, and household electrical appliances, metal accessories; Oscillator phone, cell phone parts and notebook parts; Metal keys, ATM machine keys; Toys accessories, fiber accessories; various copper, iron, and stainless steel products, alloy products; automobiles, motorcycles, machine tools, electrical machinery and office equipment, medical equipment and other types of machinery, electrical appliances, electric / pneumatic products within the precision components; Industries products within the structure of precision metal parts, metal accessories.

粉末冶金注射成型/精密铸造结构零件包括：含油轴承、轴套、法兰、连接衬套；双联齿轮、伞齿轮、锥齿轮、直齿轮、皮带轮、同步轮、链轮、AK47玩具枪齿轮、斜齿轮、扇齿轮、各类微型精密传动齿轮；粉末冶金微孔过滤器、滤芯、滤片、滤筒、滤管、消声器、过滤材料、铜过滤器、不锈钢过滤器；搅拌机刀片、咖啡机刀盘、豆浆机研磨件、榨汁机刀片、果汁机刀片、家用电器五金配件；手机振子、手机零件、笔记本零件；金属按键、ATM机按键；玩具配件、光纤配件；电机转子、凸轮、凹轮；各种铜基、铁基、不锈钢制品、合金制品；汽车、摩托车、机床、电机、办公器械、医疗器械及其他各种机械、电器、电/气动产品内的复杂异形精密零件、非标准件；各行业产品内部用的精密金属结构零配件、五金配件。

Is only a small number of China metal powder injection molding one of the manufacturers, Main production PM powder metallurgy, powder injection molding, Precision Casting, metal structural parts, metal accessories, gears, Sleeve Bearing, precision components profiled complex, non-standard conditions, including : Sleeve Bearing, oil bearings, bushings, flanged connecting sleeve; Double gears, bevel gear, Pulley, synchronous wheel, sprocket, AK47 toy gun gear, various micro-precision gear drive; PM microporous filters, filter tubes, mufflers and filtration materials, Copper filters, stainless steel trap; mixer blades, coffee machine cutter heads Soymilk Machine grinding pieces Juicer blades, Juice blades, and household electrical appliances, metal accessories; Oscillator phone, cell phone parts and notebook parts; Metal keys, ATM machine keys; Toys accessories, fiber accessories; various copper, iron, and stainless steel products, alloy products; automobiles, motorcycles, machine tools, electrical machinery and office equipment, medical equipment and other types of machinery, electrical appliances, electric / pneumatic products within the precision components; Industries products within the structure of precision metal parts!

其中包括：烧结含油轴承、轴套、粉末冶金铜套、含油杯士、法兰、衬套、偏心含油轴承、球形含油轴承；粉末冶金齿轮、双联齿轮、伞齿轮、锥齿轮、同步皮带轮、链轮、棘轮、扇齿轮、双层齿轮、多层齿轮、直齿轮、斜齿轮、各类精密传动齿轮；粉末冶金烧结微孔过滤器、烧结过滤片、粉末冶金滤芯、滤筒、滤管、消声排气节流阀、青铜烧结过滤器；搅拌机刀片、绞肉机圆盘刀片、十字绞刀、铰刀盘、圆孔板、胡椒研磨件、豆浆机刀片、榨汁机刀片、果汁机刀片、咖啡机刀片、磨豆机刀片、家电五金配件；凸轮、凹轮、偏心轮、摆砣；手机振子、手机零件、笔记本零件；金属按键、ATM机按键；玩具配件、光纤配件；各种铜基、铁基、不锈钢制品、合金制品；汽车、摩托车、机床、电机、办公器械、医疗器械及其他各种机械、电器、电/气动产品内的复杂异形精密零件、非标准件；各行业产品内部用的精密金属结构零配件、五金配件。

Foliaceous each other is unripe, unifoliate, small body, pour egg form, whole reason, top is small sunken, have transparent gland place; Air hole is irregular model; Stipule is big, stick unripe Yu Xiebing to go up.

叶互生，单叶，小形，倒卵形，全缘，顶端微凹，具透明腺点；气孔不规则型；托叶大，贴生于叶柄上。

Fruit bluish black, pendulous, cylindric, 5--10 cm, ca. 2 cm in diam., verruculose, apex truncate but abaxial suture protruded into a conical umbo; surface with or without annular, depressed, and transverse traces.

果带蓝色黑色，下垂，圆筒状，直径的5-10厘米，约2厘米，小瘤状，先端截形但是背轴缝突出成为一圆锥形的凸物；有或没有环状，下凹的，和横裂的痕迹。

Apophyses dull or lustrous, thickened, variously raised, cross keeled; umbo usually pyramidal or truncate, rarely depressed or with a reflexed prickle.

有光泽的Apophyses暗或，加厚，各种地凸起，穿过龙骨状；通常的鳞脐金字塔的或截形，很少下凹或具一反折的皮刺。

In the first section of the tutorial, you use a predefined skeletal model, consisting of unconsumed sketches, to determine the placement and extent of frame components, such as square tubing and c-channel, and then fit those components together with miters and cuts.

在自学课程的第一节，您将使用由未消耗的草图构成的预先定义的骨架模型，来确定框架元件(如方形细配管和 C 形凹槽)的置放和实际范围，然后使这些元件与斜接和切割配合在一起。

Fruit dehiscent silicles, obdeltoid to obdeltoid-obcordate, strongly flattened and angustiseptate, sessile; valves papery, prominently veined, strongly keeled; replum rounded; septum complete; style less than 1 mm, included or exserted from apical notch; stigma capitate, entire.

开裂的果短角果，倒三角形对倒三角形倒心形，强烈扁平和，无梗；纸质的裂爿，显著脉，强烈龙骨状；假隔膜绕行；隔膜完全；称呼不到1毫米，包括或从顶端凹缺；柱头头状，全缘。

Petals absent or (1--)3--5, 2-lobed, occasionally appendiculate in sinus and/or auriculate at top of claw.

花瓣无或(1-)3-5，在凹缺和/或耳形在顶端的瓣爪2裂，偶有附着。

Nutlets dorsiventrally compressed, ovate to suborbicular, 5-10 mm, abaxially discoid, flat or slightly concave, with dense glochids on abaxial margin and adaxially; attachment scar above middle adaxially, occupying ca.

背面小坚果压缩，卵形到近圆形，5-10毫米，背面盘状，平或者稍凹，具紧密的由背轴边开出的钩毛和正面；正面，约占用的附件痕在中部以上装以面，坚定连着对。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。