母

5A kind of stress-relief groove of box thread joint has been developped. Finite Element models of several thread joints have been established by ABAQUS. The Morrow Strain-life Model is used to evaluate the fatigue life of 3 kinds of connections with different stress-relieaf grooves of box. The results show that the fatigue life of box with stress-relief groove developed in the paper is the longest.

为了定量评价几种螺纹接头的疲劳寿命大小，采用Morrow应变周期模型结合有限元分析结果计算3种具有内螺纹应力减轻槽母扣的疲劳寿命，计算结果表明本文设计的内螺纹应力减轻槽能显著延长母扣的疲劳寿命。

The influence of light stabilizing agents, antioxidant agents, colour masterbatch and filler of CaCO 3 on ageing behavior of speciality was studied by artificial accelerated ageing tests of carbon arc lamp and fluorescent UV-B type light.

选择国产基础树脂与稳定剂，采用碳弧灯和B型荧光紫外灯人工加速老化试验，研究了光稳定剂品种、用量、与抗氧剂的复配及色母粒、重钙母粒对专用料老化性能的影响。

When oocytes were matured at 37-39℃,the appearance of cumulus cell had protective effect on cleavage and blastocyst rate,the development rate of DOs significantly decreased compared to COCs.

当卵母细胞在37-39℃成熟培养时，卵丘细胞对卵母细胞的发育有一定的保护作用，DOs的发育能力显著低于COCs。

We have developed on our own various types of PE, PP, ABS, PS special Color Master Batch, widely used in injection molding, blow molding, blow film and filature, etc, and provide professional color matching, modified granulation services for plastics customers, strictly complying with QB1648-92 standard, and use advanced computer color matching system to provide rapid plastics color matching services and ensure that constant stability of Color Master Batch.

凭借多年以来在颜料行业的领先优势和厚重的技术积累，本公司自主开发了各种PE、PP、ABS、PS专用色母，广泛适用于注塑、吹塑、吹膜、纺丝等工艺，并为塑料客户提供专业配色和改性造粒服务，严格执行QB1648-92行业标准，使用先进的电脑配色系统为客户提供准确快速的塑料配色服务，并保证色母质量的长期稳定。

Nanan City, Fujian Province Start Plastic Color Masterbatch Factory Founded in 1996, is a larger, reputable private owned enterprises, mainly produce plastic Color Masterbatch and even dual-rotor mixer.

福建省南安市实达塑料色母厂成立于1996年，是一规模较大，信誉良好的私营独资企业，主要生产塑料色母和双转子连混炼机。

GB screw, self-produced self-Pin (4-56) high-strength screw, lead screw 12-48 ladder deduction is deducted,·, joint mother, Cone's mother, tubes, implosion, custom-made single-head, double-headed, anchor bolts and all kinds of special pieces, quality reliable, delivery timely, available year-round spot.

国标丝杠、自产自销(4-56)高强度丝杠、梯型扣丝杠12-48、正扣、反扣、接头母、锥型母、管、内爆、订做单头、双头、地脚螺栓及各种异型件，质量可靠，供货及时，常年备有现货。

Understanding the role of cumulus oophorus in oocyte maturation will enable us to reveal the mechanism of mammal ooc.

卵丘是指在卵母细胞外周并与之进行代谢联系的颗粒细胞群；卵丘对于卵母细胞成熟有极其重要的作用。

This thesis is divided into seven chapters, each of them traces the origins or prototypes of one or several related motifs in the Han tomb reliefs, ranging from the frontal chariot, the frontal horse, the single-headed and double-bodied monster, etc.

汉代艺术中外来母题举例本文的主题，是以画像石为中心的汉代艺术所受的外来影响。内容共分为7章，每章讨论一个或若干个相关联的母题，如正面车马，正面骑，一头双体等。

It is the cathedral of Rome, ranks first among the four "major basilicas" in Rome, and holds the title of "Ecumenical Mother Church," meaning the mother church for all the faithful pilgrims living on Earth.

它是罗马的主教座堂，名列罗马四座「特级大殿」之首，拥有「普世母堂」的衔号，意即所有在世上旅途教会信友们的母堂。

It is indicated that even though there are different types of soil and their bedrocks, the distribution still keeps the similar model of the REE in bedrock.

结果表明：尽管土壤及其母质类型不同，但是其稀土元素分布还大体上保持母质中的分布模式特征。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。