The results indicate that it is favor of improving the strength and ductility with lower density at the condition of enhancing the stirring and prolonging the time before casting and using CaF2 as the flux cover.

The theory and practice of flux cover in mold teeming

模注保护渣的理论与实践

Process Technology of Circular Watch Tempering Glass Cover

圆形钢化玻璃表盖加工工艺的探讨

Cupped in his palm was a small ， round instrument with a glass cover and a jiggling needle.

他的掌心托着一个小小的、圆形的仪器，仪器带有一个玻璃罩和一根会摆动的针。

The calculation shows that using the selective coating and the cylindrical glass cover both are the effective means to improve the thermal performance of the collector.

计算表明，使用选择性吸收涂层和圆管形玻璃罩都是改善集热器热性能的有效措施。

Second, according to working characteristic of thin-wall pipe pile using cast-in-situ concrete in ocean engineering and roadbed engineering, we divide pile into two kinds of situations named pile with cover and pile without cover.

根据筒桩在海洋工程和路基工程中的工作特点，将筒桩分为无盖和有盖两种情况。

A piece of thick heavy fabric ( usually with nap or pile) used to cover a floor.

铺在地板上的一块厚重的布（通常有绒毛）。

At last, examples for the application of cement injection pile and changing cover soil mattress ground treatment is given.

最后，给出了粉喷桩和换土垫层地基处理方法的工程应用实例。

To create a weed compost pile, cover the weeds with a black plastic bag or tarp and leave them to decompose for up to 2 years.

如果用杂草制作堆肥，用黑色塑料袋或防水布覆盖杂草，让其腐烂两年的时间。

In 1962, Stylosanthes was firstly introduced to Hainan of China as a cover crop in rubber tree plantation from Malaysia.

我国于1962年首次从马来西亚引种柱花草到海南岛，作为橡胶园的覆盖作物。

If possible, in the year before you plant potatoes, plant a cover crop to improve the soil and the potato production.

如果可能的话，在中土豆的前一年种一种覆盖作物来改善土壤，提高土豆产量。

Variation of nutrient elements of winter cover crop residues in agroecosystems under no tillage and conventional tillage

免耕和常规耕作农田生态系统冬季覆盖作物残茬分解和养分变化

Carbon fixation in every cover crop treatment is higher than that of winter fallow cropland.

黑麦草的碳蓄积量显著高于紫云英和油菜，各覆盖作物处理碳蓄积量均显著高于冬闲田。

Effects of Former Stubble Winter Cover Crop on Microbial Characteristics in Paddy Soil

前茬冬季覆盖作物对稻田土壤的生物特征影响

The Effect of Winter Cover Crop on Microbial Ecological Under the No-tillage System

免耕条件下覆盖作物对微生物生态的影响

The effect of winter cover crop on soil organic carbon and crop yield

农田冬季覆盖作物对土壤有机碳含量和主作物产量的影响

Faced with major domestic and foreign customers, acceptance of the auto cover die seized fixture design drawings, and related technology support, technical services business.

主要面对国内外客户，接受各汽车覆盖件模检夹具设计图纸工作，及相关技术支持，技术服务等业务。

Design CAD of Toilet Cover Die

坐便器上盖模具的计算机辅助设计

Application of Overhaul Closed Type Cover Die

闭式套模翻修的应用

On Manufacture& Adjustment of Large Automotive Cover Die

试论大型汽车覆盖件模具制造调试的途径

Research and development of CAPP for motor cover die

汽车覆盖件模具CAPP系统的开发研究