可循环的

Air Elite 4h chemical oxygen breathing apparatus are oxygen Health Self-contained breathing apparatus cycle will provide 4 hours of operating time, the supply of breathing air capacity of 4800 liters.

Air Elite 4h 化学氧气呼吸器是生氧式自循环呼吸器，可提供4小时的作业时间，供应的呼吸空气容量达4800升。

Elementary discussion on ventilation mode of the power house of hydropower station in river channel;2. According to the State Standard of Indoor Air Quality GB/T18883-2002,the air pollutants in the passenger car cabin were measured,and the influence of temperature,the type of car,the time since the manufacture date and the ventilation mode on the air quality was evaluated.

5倍；车内污染物的质量浓度随时间延长不断衰减，约10 d后趋于稳定；发动机运转时客车内污染物质量浓度升高，车内的空气质量变差；自然通风与循环通风均可使车内污染物质量浓度迅速下降，但自然通风方式效果更好。

Circler economy is a model of economic development which sparkplugs harmony with environment .

循环经济是21世纪人类实现可持续发展的科学的经济发展模式。

Circular Economy is an inevitable choice of sustainable development, and is superior form of the new industrialization.

循环经济模式是可持续发展的必然选择，是新型工业化的高级形式。

Pneumatic down-the-hole hammer is a drilling method with many advantages.Its features,such as wide application range,high hole quality,no circulating medium,low operation regulations,and drilling big diameter rock hole,fit to construct slide-resistant pile.

风动潜孔锤钻进是一种具有许多优点的钻进方法，它的许多特点，如成孔质量高、应用范围广、无液体循环介质、钻进规程参数小、可实现大直径基岩钻孔等都适合于抗滑桩施工。

Cards can be orderly collected in some quantity by electronic card collator, and stably transported onto conveyor belt.

由电器控制的循环理牌器可将每付扑克牌或卡牌按一定的数量理顺整齐，并可靠地送至输送带上。

With this method, the reliability to direct the constraint graph is increased, the computation complexity is reduced, and the cyclic constraint graph can be solved expediently.

应用此方法，可提高约束图有向化的可靠性、降低计算复杂度，且能方便地求解带有循环约束的约束图。

Theorem 7 Let G be a group, if every subgroup of G of prime order is contained in Z_∞,2 ∈π, every cyclic subgroup of G of order 4 is π-supplemented in G,then G will be nilpotent.

定理7设G是群，G的素数阶子群包含在Z_∞中，2∈π，如果G的每个4阶循环子群在G中π-可补，则G为幂零群。

The cycling life of Ni 〓 was measured with powder microelectrode by cyclic voltammetry for the first time. Results show that the depth of charge is up to 75%, and the depth of discharge almost reached to 100% when the scanning range is controlled within 0～ 0.6V vs.

对Ni〓粉末微电极的测试表明，当控制三角波扫描范围0～0.6V、扫描速度20mV/s时，每次循环电极的充电率可达到75%，而放电率接近100%，完成一个周期仅需要1分钟，因此极大地缩短了测试时间。

Checksum, CRC, hash algorism, message digest, digital autograph and public denskey system are thetechnology to transmit relative data, confidential information and veracity confirmation through compuer or internet, and couldbe applied to the government network.

校验和、循环冗余校验码、散列算法、消息摘录、数字化签名和公共密钥加密系统是可用于INTERENT网或用计算机传送的有关数据、信息加密和真实性确认的技术。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐