凹陷

The study found that it is not symmetrical convex parabolic type, left and right sides are not equal to the minimum axial velocity near the rod at the minimum axial velocity is small in the different condition from water to the various solution of HPAM chroma in the vertical eccentricity annuli with wide gap at pipe.

研究发现不同介质的流体在螺旋流条件下，其在偏心环空中的轴向速度分布不是左右对称的凸抛物线型，而是中间有凹陷且左右不对称的抛物线型，其轴向速度的极值点向模拟油管内壁偏移。

Pecten Orient Company LLC, a Royal Dutch/Shell subsidiary, and Unocal Corporation today said that they will not proceed with five contracts to explore for, develop, and market natural gas resources in the Xihu Trough of the East China Sea.

荷兰皇家/壳牌公司下属的派克顿东方有限公司和优尼科公司今天宣布，他们已经不再继续有关勘探、开发和销售中国东海西湖凹陷区天然气资源的五个合同。

To make sure the petroleum migrating direction and pool-forming model in the Weixinan sag ,4 wells were chosen to do research on fluid inclusions and petrography.

为查明北部湾盆地油气运移方向及成藏模式，在涠西南凹陷选取有代表性的4口井进行储集层流体包裹体研究和系统的岩相学研究。

The Sun's photosphere has thousands of bumps called granules and usually a few dark depressions called sunspots.

图中的太阳光球层视野区域有数千凸起物，一般称为米粒组织；夹杂着一些小黑凹陷区域，我们称为太阳黑子。

The typical symptoms were that there were superficial brown lesions on pileus.

子实体被感染后，菌盖表面出现圆形或椭圆形褐色凹陷斑，在潮湿条件下，尤其是菌盖表面有水膜时，该病最容易发生。

Objective To explore the method of repairing pitting defect.

目的：探讨凹陷组织缺损的修复方法。

Seed face plane, concave to sulcate.

种子表面平，凹陷到有槽。

The plastron is also only just concave on the male shown.

只有雄性刺山的腹甲会呈现凹陷。

Though a general rule of thumb for turtles concerning sexing ids that males have a longer thicker tail, as well as a concave plastron, this appears to not apply to these turtles as strictly.

性别与繁殖：凭经验来说，龟龟性别判定的重要特征是一条又粗又长的尾巴和凹陷的腹甲，但这几点对于刺山来说，却并不严格准确。

Taking the eastern sag of the Liaohe basin where coal, oil and gas resources coexist and the Wangying borefield of the Fuxin basin where coalbed gas was first discovered, researched and developed in China as examples, we systematically discuss the control of volcanism on the lateral and vertical distribution of brown coal, flame coal and gas coal in the third member of the Paleogene Shahejie Formation and on the gas source conditions of each coal region. Both the methane released in the process of regional plutonic metamorphism and the additional methane generated by contact metamorphism are calculated. The physical properties and storage capacity of the coal beds changed greatly due to the formation of blackcoal and highlymetamorphosed crevice coal from igneous intrusion. The sealing capacity of intrusions with various occurrences such as dikes is highlighted.

以煤、油、气共生的辽河盆地东部凹陷和我国首次在矿井中发现、研究、开发煤层气藏的阜新盆地王营井田为例，系统地阐述了火山活动在古近系沙河街组三段对褐煤、长焰煤和气煤在平面及垂向分布的控制，进而导致各赋煤区气源条件的不同；估算了王营井田在区域深成变质过程释放甲烷气的基础上，接触变质作用所形成的附加甲烷量；指出由于岩浆侵入形成了天然焦和高变质裂隙煤，使煤层物理性质及储集能力发生了大的变化；强调了岩墙等不同产状的岩浆侵入岩体对煤层气的封闭作用。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐