spiral layer

As a result, the spiral growth structure of nacreous layer is produced by the periodically alternative growth of aragonite and organic matrix in the time and space.

有机质与文石微晶在时间和空间上的螺旋交互生长具有周期性，从而产生珍珠层表面的这种结构形态。

Study on the Working of Penstock and Spiral Case with Elastic Layer

垫层钢管和垫层钢蜗壳研究以拉西瓦水电站工程为例

CONSTRUCTION: Steel wire spiral reinforced layer, and wear resistant synthetic rubber cover.

结构：由钢丝缠绕骨架层和内外耐油、耐腐蚀合成橡胶组成。

The spiral wave instability in vortex of two-layer barotropic fluid

两层正压流体涡旋中螺旋波的不稳定

The Feasibility Evaluation of the Giant Spiral Case Using Cushion Layer

巨型水轮机蜗壳软垫层埋设方式可行性论证

The penstock and spiral case with elastic layer are defined as a engineering measure of having flexible layer material surrounding it to meet the needs of bearing loads in structure.

在水电站压力引水钢管或钢蜗壳外表敷设软垫层材料以满足结构受力要求的工程措施称之为垫层管或垫层蜗壳。

Spiral Nucleating Growth of Nacreous Layer on Pteria Penguin and Blister Pearl Controlled by Organic Matrix

有机质调控下企鹅贝及其附壳珍珠的珍珠层螺旋生长成核

Spiral Growth Structure and Its Mechanism of Nacreous Layer of Pteria Penguin and Blister Pearl From Sanya, Hainan Province

珍珠层螺旋生长结构及其生长机制&以海南三亚企鹅贝和附壳珍珠为例

Spiral case with cushion layer relative to the water filling pressurization and buried type two kind of forms, has simple construction, saving investment, construction period is relatively short and other advantages, and in the domestic large and medium-sized hydropower station have been widely applied in.

垫层蜗壳相对于充水保压及直埋式两种形式，具有施工方法简便、节省投资、施工工期较短等明显优势，因而在国内大中型水电站中得到广泛应用。

Study of Spiral Growth Structure of Nacreous Layer from Pteria Penguin and Blister Pearl by AFM

企鹅贝附壳珍珠表层螺旋生长结构的原子力显微镜研究