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。
Oil recovery enhancing mechanism by natural zeolite and the effect analysis;
天然沸石提高采收率作用机理及效果
Adsorption of cadmium (Ⅱ) in solution by natural zeolite-chitosan adsorbent;
天然沸石负载壳聚糖吸附溶液中镉(Ⅱ)的研究
Removal of arsenic from water by modified natural zeolite and chitosan;
天然沸石负载壳聚糖去除水中砷的研究
The objects of the treatment method include mainly the natural diamonds,HTHP synthetic diamonds and chemical vapor deposition(CVD) synthetic diamonds.
该处理方法的对象主要有天然钻石、高温高压合成钻石以及化学气相沉淀法合成钻石。
Experiments were carried out to evaluate the NH4+ adsorption capacity of natural vermiculite and bio-vermiculite systems.
研究了天然蛭石与生物蛭石的氨氮吸附能力。
As an alternative solution to the poor performance of constructed wetlands in municipal sewage treatment in winter,a buffer unit using natural vermiculite as filler was introduced into the system.
针对当前人工湿地污水处理中普遍存在的冬季处理效果差等问题,研究了在处理系统中构建天然蛭石缓冲单元及其吸附饱和后进行生物再生的可行性。
artificial foliage of natural stone(non-precious)
人造叶饰,天然石料（非宝石）制
artificial fruit of natural stone (non-precious)
人造蜡制水果,天然石料（非宝石）制
cachou box of natural stone (non-precious)
天然石料（非宝石）制口香糖盒
bowl of natural stone [non-precious, excl. antiques]
天然石料制碗[非宝石,不包括古玩]
cup of natural stone (non-precious)(excl. antiques)
杯子,天然石料（非宝石）制（不包括古玩）
oil stone for used in the hand, of natural stone, agglomerated abrasives or ceramics
手用油石,天然石料、凝集研磨料或陶瓷制
hone ,for used in the hand, of natural stone, agglomerated abrasives or ceramics
手用刀石,天然石料、凝集研磨料或陶瓷制
Natural Resources: crude oil, natural gas, limestone, fish.
自然资源：原油、天然气、石灰石、鱼。
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
oil and natural gas map
石油和天然气分布图
natural uranium graphite reactor
天然铀石墨慢化反应堆
He's a diamond in the rough.
他是一颗天然的宝石。
"fossil fuels: coal, oil, and natural gas"
矿物燃料(煤、石油、天然气)
Coal and oil are natural products.
煤和石油是天然物产。