Conclusion: The retention and stability of the overlay abutment covered with metal crown cap and mandible complete denture enhanced in varing degrees and achieved good results. It is easy to popularize.

The article mainly introduce design principle of magnetic force turning order equipment for crown cap, point out the key questions for design, summarize myself view and experience that are referred when to design.

本文主要介绍了磁力回转式王冠盖理盖器的设计原理，指出设计时的关键因素，总结出自己看法和经验，供实际设计时参考。

This paper analyses the airtightness of crown cap closures and suggests some adjustements to en-sure enough airtightness.

对王冠盖封口气密性进行了分析，为保证足够的气密性提出了相应的调试方法。

Compensatory effect of newly-developed Jerkin-G-suit against positive pressure breathing

新研囊式背心抗荷裤对加压呼吸的代偿效应

The application of phosphate increases more higher yield of vegetable pea in the acid soil.

在酸性土壤上增施一定量的磷、钼，能显著提高莱豌豆的品质和产量。

The seedling growth was better in limestone soil and garden soil than those in acid soil.

任木幼苗在石灰岩土和园土上生长比酸性红壤上好。

There are many rare species, complicated geographical composition and the plants in acid soil there.

区系种类组成丰富，地理成分复杂，酸性土植物优势明显，珍稀濒危植物和特有成分较多。

Most of broad bean is grown on the acid soil in the south of china.

我国种植在南方地区的蚕豆分布在偏酸性的土壤上，酸性土壤中的铝毒作用和冬季水分胁迫是蚕豆生长的主要限制因素。

Corrosion behaviour of stainless steel in acid soil with a simulated sulfuric acid rainfall

模拟硫酸型酸雨作用下酸性土壤中不锈钢腐蚀电化学行为的研究

Influence of Acid Soil on the Quality of Groundwater in a Cereal Base of Guangdong Province

广东某粮食基地土壤酸性条件对地下水质量影响

This thesis expounded the influence of the acid soil of rice bed on seedling growth.

论述了水稻床土调酸效果及其对秧苗生长发育的影响。

Study on selecting VA mycorrhizal fungi species adaptable to acid soil

酸性土壤适生VA真菌菌种筛选研究

Used as soilless culture in agriculture, fertilizer with quick result for acid soil.

农业上用作无土栽培，酸性土壤的酥胸啊肥料。

Residual effect of lime application on farming system of tobacco-rice in acid soil

酸性土壤施石灰对烟稻轮作后效的影响

Conformation and transport characteristics of aluminum in acid soil and its effect of tree root growth

酸性土壤铝的形态、迁移特征及对林木根系的影响

The Studies on Genetic Improvement of Barley Yield on Reddish-Acid Soil

酸性红黄壤土上大麦遗传改良研究

Roses will not root in such acid soil.

玫瑰在这种酸性土壤中不会生根。

Leaching out of base ions from acid soil can cause plant nutrient lack.

土壤中盐基离子大量淋失，造成植物必要养分缺乏；

The effect of extraction temperature on determining value of available copper and zinc in acid soil

提取温度对酸性土壤有效铜、锌测定值的影响

Study on selection of slope protection plantation varieties in acid soil mine area reclamation

酸性土壤矿区复垦中护坡植被品种筛选研究

Alleviating Effect of Silicon on Aluminum Toxicity to Wheat Growth in Acid Soil

硅对酸性土壤铝毒的缓解作用