叶酸能帮助防止诸如脊柱裂等神经管畸形出生缺陷的发生。
Folic acid helps prevent neural tube birth defects such as spina bifida.
本文主要论述了动荷载作用下岩石等脆性材料的断裂破坏机理、裂纹形成与扩展以及裂纹的止裂与控制等内容。
Fracture mechanism, initiation and propagation of cracks, and the control method of cracks in rock like brittle material under dynamic load are described in this paper.
两剖面复成分砾岩杂色沉积、泥裂、石膏层等为该区可能存在的干旱气候提供了依据。
The occurrence of variegated polymictic conglomerate sediment mud cracks gypsum strata and so on can provide evidences for aridity climate in western liaoning.
丙烯酰胺类聚合物在油田各领域应用极广，无论是钻井、固井、堵水、压裂还是驱油等多个方面都有应用。
The acrylamide kind polymers have a very wide application in oil field, like drilling cementing exclusion of water compressive fracture and flooding oil etc.
护肤型化妆品，如含水廿油、冷霜、按摩膏和防裂膏等，多为油脂型，而营养型化妆品又含脂肪、蛋白质、维生素等营养素。
Skin type cosmetics, such as water twenty oil, cold cream, massage cream and ointment crack, mostly for oil-based, and nutrition-based cosmetics and fat, protein, vitamins and other nutrients.
分析了水利水电等工程中的水力劈裂与人工致裂边界条件的不同。
The boundary condition differences between natural power and artificial driven fracturing in hydraulic and hydroelectric engineering are presented.
结果迟发性颅内血肿、弥漫性脑肿胀、侧裂区脑挫裂伤、脑组织缺血、缺氧等是重型颅脑损伤术中急性脑膨出的主要原因。
Results The main cause of acute encephalocele were delayed intracranial hematomas, acute diffuse brain swelling, cerebral contusion and laceration in Sylvain tissue and ischemic anoxia.
地层破裂压力(梯度)是确定地层压力检测的一个重要组成部分，对钻井、完井和压裂等施工都相当重要。
One of the important parts of formation pressure detection is to determine formation fracture pressure, which is important for drilling, well completion and fracturing.
采用低倍组织试验、化学成分分析及金相检验等方法，对出现边裂的带钢卷进行了解剖分析。
Structure testing in low magnificution, chemical composition analysis and microstructure examination were used to analyze the edge cracking of strip steel coil.
民用刀剪在加工过程中，由于磨削等原因，容易产生裂纹，引起刀剪刃口卷裂或产生缺口。
In grinding process of civil cutter, crack is easy to happen by the reason of grinding, and it causes gap.
并结合工程实际介绍了分层分块设计、混凝土温控、施工质量控制、增设温度筋和抗裂筋等技术措施。
In addition, spiral case design method by layers and blocks, concrete temperature control, construction quality control, additional anti-crack reinforcement bar disposal, etc.
通过大量的预裂爆破试验，得出了适用于该边坡的炮孔直径、炮孔间距、线装药密度、不耦合系数等一系列常规预裂爆破参数。
Pre-splitting blasting experiments were carried out to obtain normal pre-splitting blasting parameters such as hole diameter, hole space, gun- powder charge line density, and uncoupling factor.
油藏开发初期，曾采用常规压裂，限流压裂和土酸酸化等增产措施，但效果不理想。
During initial reservoir development period, the result of well stimulation using conventional fracturing, limited entry fracturing and mud acidizing is poor.
压裂设备包括泵机组、混砂车、散装运输设备(如砂子和压裂液运送设备)以及管汇拖车等。
Fracturing equipment includes pumping units, blenders, bulk handling equipment such as sand and frac fluid transports, and a manifold trailer, etc.
具有改善混凝土抗裂能力、抗冲击抗磨耗能力等作用。
It can be used to improve the concrete cracking resistance and seepage resistance.
目前对油井压裂技术培训主要是通过文字、图片等资料。
At present, the technical training of fracturing is mainly through text, pictures and other information.
结果肝左叶体积、肝表面形态和肝裂增宽等肝脏形态学改变随着肝纤维化严重程度的加重而有统计学差异。
Results With the severity of hepatic fibrosis, the volume index of left lobe of liver and changes in hepatic contour, widening of inter lobar fissure increased significantly.
通过测试胶凝材料水化热、混凝土的坍落度和氯离子扩散系数、抗裂等级等性能，对C40海工混凝土的配合比进行了优化设计。
The mixture ratio of C40 Marine high performance concrete is optimized through test of the hydration heat of binding material, slump, chloride ion diffusion coefficient, anti-crack rand of concrete.
对生产数据进行分析，认为钢水成分、拉速和结晶器液面波动等是造成连铸坯表面纵裂的主要原因。
The composition of molten steel, cast speed and mould level changing are thought to be main reasons of causing surface longitudinal cracks by analyzing producing data.
以无机类的轻质保温颗粒作为轻骨料，加由胶凝材料、抗裂添加剂及其他填充料等组成的干粉砂浆。
In the light of inorganic heat preservation particles of light weight aggregate, add as by cement materials, crack additives and other such as filling of dry mortar.
具体而言，要优选材料、改进配合比、喷洒污用防裂剂、还要加强面层护养等措施。
The concrete measures contain choosing high quality materials, improving mix proportion, using anti-cracking agent and intensifying surface maintenance.
在平面应变假设下，给出其二维精确解，并提供了机械应变能释放率和裂尖能量释放率等数值结果。
The two dimensional accurate solution is obtained on plane strain assumption, the numerical results of strain energy release rate and crack tip energy release rate are presented.
耦合弱的特点与俯冲板块年龄小、抗挠强度弱、俯冲角度大、海沟后撤、岛弧裂离和弧后拉张等特点是一致的。
The weak couplings are in agreement with such tectonic features as young subduction slab, weak flexure strength, large subduction Angle, trench retreating, arc rifting and backarc extension.
解决了披裂、强力下降、树皮皱、露白等关键技术难点。
The pivotal technologic problems such as cleavage, strength decline, tree bark and threadbare were solved.
对方坯重轨钢系列铸坯内部产生的中间裂、中心裂等缺陷进行工艺探索研究，以解决生产过程中出现的内部质量问题。
This paper mainly analyzes the process of bloom casting for heavy rail and internal cracks like central crack and so on in order to solve the internal quality problems.
用于由伤风感冒所致的鼻塞，昆早叮咬，皮肤皱裂，轻度烧烫伤，擦伤，晒伤以及皮肤瘙痒等。
For nasal congestion caused by the cold, early Queensland bites, cracked skin wrinkles, mild burns, abrasions, sunburn and skin itching.
本文还对化爆加载下的HR2和DT2等进行了实验研究，对实验研究过程中出现的层裂等损伤现象进行了分析。
The dynamic behavior of HR2 and DT2 under explosive load were also studied in this paper, and the damage phenomena like spallation were analyzed.
然后探讨了初始温度和降温速率等对温度应力的影响以及不同材料的低温抗裂性能。
Then the authors analyse the effect of initial temperature and cooling rate on thermal stress and the low temperature cracking performance of different asphalt cement.
然后探讨了初始温度和降温速率等对温度应力的影响以及不同材料的低温抗裂性能。
Then the authors analyse the effect of initial temperature and cooling rate on thermal stress and the low temperature cracking performance of different asphalt cement.
应用推荐