查询词典 concave line

This paper also describes the conditions for ensuring two engagement lines with double concave-convex circular arc profile.

讨论了中心距偏差和切深偏差相互补偿问题。文中还讨论了双圆弧齿形保持双啮合线的条件。

Researches show that the drive force characteristics of the electric tractor drive system based on series DC motor is close the ideal characteristics, the curves are concave, low speed with constant power, and high speed with constant torque; the electric tractor has large working speed under different shifts, but the extensive coincidence speed shows that the variable ratio of the gear is unreasonable; the maximum climbable gradient of this electric tractor is more than 30%, and does not need frequent shift when working for its extensive climbable gradient; there are many influence factors of continuous working time, which the more obvious factors are working speed and working load, the working time increases with the increase of the working speed and working load.2. Simulation researches on the drive characteristic of the electric tractor.

研究结果表明：基于串励直流电动机(来源：ABC21论文网www.abclunwen.com)的电动拖拉机电驱动系统的驱动力特性场接近理想驱动力特性场，其各挡下的驱动力特性是一组下凹的曲线，低速恒转矩，高速恒功率；同一行驶速度下所对应高挡驱动力大于低挡驱动力，这是由电机的调速特性决定的；电动拖拉机各个挡位下具有较广的稳定作业速度范围，但是各个挡位之间速度重合的范围较多，说明所用变速箱变速比与电动机匹配不合理；电动拖拉机最大爬坡度达到30%以上，并且各挡爬坡度变化范围较广，作业过程中不需要频繁换挡；影响电动拖拉机连续作业时间的因素较多，其中作业行驶速度和作业负荷影响最为明显，作业负荷越大，连续作业时间就越短，作业速度越快，连续作业时间就越短。2、电动拖拉机驱动特性仿真研究。

This paper proposes an algorithm for union, intersection and trim of the closed region, which is based on convex-concave points.

本文提出了一种基于交点的凹凸性求封闭区域的并、交、差的算法。

A cylinder is a hollow tube with a closed concave base that permits it to stand up right.

钢瓶是中空的管道，封闭的底部是凹入的，这样可以直立起来。

A cylinder is a hollow tube with a closed concave base that permits it to stand upright.

钢瓶是中空的管道，封闭的底部是凹入的，这样可以直立起来。

A cylinder is a hollow tube with a closed concave base that permits the cylinder to stand upright.

钢瓶是中空的管道，封闭的底部是凹入的，这样可以直立起来。

Is a hollow tube with a closed concave base that permits the cylinder to stand upright.

钢瓶（图1）是中空的管道，封闭的底部是凹入的，这样可以直立起来。

Among picosecond fluorescence spectroscopy setup, sample cell, one side is concave, and collimate optics system were designed and made. Which improve fluorescence collect rate 30%, and is key to experiment.

在荧光光谱装置中，设计制作了一侧为凹面的样品盒和准直光学系统，提高荧光的收集效率30%，对实验成功起了关键的作用。

Commissure face of seed deeply concave or sulcate.

果表面瘤状的或具小乳突。

The clip refers to the length and angle of the concave curve on the non-cutting portion of the point of the blade.

回形刀刃在刀尖的非切割部分采用的是凹曲线的长度和角度。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48