The reaction data of neutron with natural mercury are calculated by means of the optical model(OPM),the many- step procedure half classic theory , the double differential crosssection theory( DDCS ) and the gamma-ray production data theory in the incident neutron enenyrange between 0.
１～２ＯＭｅＶ的中子与天然汞相互作用的全套核反应数据，计算结果与评价的实验数据比较，符合较好。
Production practice of substitue desulfogypsum for natural gypsum as retardant;
脱硫石膏代替天然石膏作缓凝剂的生产实践
The results show that though the waste gypsum used independent can affect the setting time and the strength of cement, the waste gypsum mixed with natural gypsum is used as cement eretarder, and the content of SO3 is controlled correctly, the qualified cement can be produced in inherent technology conditions, and the high performance concrete can be made with this cement.
研究结果表明,废石膏作为水泥缓凝剂单独使用时虽然可能会影响水泥的凝结时间和强度,但如果与天然石膏搭配使用,并控制适当的SO3掺量,就可以在原有生产工艺参数基本不变的条件下,生产出合格的水泥,而且可以配制出符合建筑工程要求的高性能混凝土。
This paper introduces raw materials,manufacture technology,properties and application in construction of natural anhydrite plastering material,its economic benifits were preliminary analyzed on basis of the results of pilot_production at plant.
简介了天然硬石膏粉刷材料的原料、生产工艺、产品性能及工程应用，根据工业性试生产结果，进行了初步经济分析。
Through measuring hydration rate of different age and the strength of a certain age,analysis and study the situation of activity stimulated that are from different areas of natural anhydrite add salt and alkaline activator.
通过测定不同龄期水化率以及一定龄期的强度,对加入盐类和碱性激发剂不同产地天然硬石膏的活性激发情况做了分析研究。
Experiment on Using Fluorine Gypsum as Retarder Instead of Natural Gypsum;
利用氟石膏代替天然石膏作水泥缓凝剂的试验
On Christmas day, the man still had his right leg in plaster.
圣诞节那天，这人的右腿仍然绑着石膏。
Study on Improving Activity of Natural Anhydrite and Making Cementation;
天然硬石膏活性激发及胶结材的制备
Study on Hydration and Hardening of Natural Anhydrite and Its Activation
天然硬石膏水化硬化及活性激发研究
It also discussed the fineness and activating agent in modification of natural anhydrite.
本中还对细度与激发剂对天然硬石膏的改性机理进行了探讨。
Surface Coating of Superfine Powders of Natural Anhydrite and Orthogonal Analysis on Its Effective Factors
天然硬石膏超微粉体表面多层包覆改性影响因素正交分析
Cement prepared with solidified phosphogypsum as retarder had similar setting time as cement prepared with natural gypsum and higher strength than them.
固化磷石膏磨制的水泥和天然二水石膏磨制水泥相比,二者的凝结时间最接近,强度有一定的提高。
Amanita species from Heishiding Nature Reserve in Guangdong
广东黑石顶自然保护区的鹅膏属真菌
This paper has studied the influence of fineness and activating agent on hydration and character of hard body for natural anhydrite.
本文研究了细度与激发剂对天然硬石膏的水化及其硬化体性能的影响。
Gypsum and anhydrite
GB/T5483-1996石膏和硬石膏
APPLICATION OF THE FIR ESSENCE OIL IN THE OINTMENT COSMETICS
天然冷杉精油在膏霜类化妆品中的应用研究
Natural Resources: crude oil, natural gas, limestone, fish.
自然资源：原油、天然气、石灰石、鱼。
limestone-gypsum handling system
石灰石／石膏处理系统
a salt found in nature as chalk or calcite or limestone.
白垩、方解石或石灰石等天然的盐。
estimation of oil and gas reserves
石油和天然气储量计算
natural road, partly metalled
天然道路，一部分铺碎石
insert natural diamond bit
天然金刚石镶齿钻头
International Committee on Natural Zeolites(ICNZ)
国际天然沸石委员会