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The invention provides an anhydrous hydrogen fluoride production process; reaction raw materials fluorite powder and sulfate are mixed by an external mixer and enter into a converter with jacket; hot air with the temperature of 350 DEG C to 600 DEG C is fed in the jacket; the fluorite powder and the sulfate have chemical reaction and produce hydrogen fluoride; the produced hydrogen fluoride enters into a scrubber from a furnace header to be washed; the washed hydrogen fluoride enters into an intermediate tank from a condenser, and then receives distillation and degasification to prepare the finished product anhydrous hydrogen fluoride; solid residue is emitted from a furnace tail.

本发明提供一种无水氟化氢生产工艺，反应原料萤石粉及硫酸经外混器混合后进入带有夹套的转炉，向夹套内通入350～600℃的热风，萤石粉和硫酸在发生化学反应生成氟化氢，生成的氟化氢气体由炉头进入洗涤塔进行洗涤，洗涤后的氟化氢由冷凝器进入中间槽，然后经过精馏、脱气制得成品无水氟化氢；固体残渣由炉尾排出。

The aerodynamic design of the hybrid airship body makes use of the flow of air and provides the remaining lift.

气动设计的混合体飞艇使用的空气流量，并提供余下的电梯。

Site that compares air mattress brands and provides consumer ratings of various products to help you in your purchasing decision.

相比之下，现场空气床垫品牌和消费者收视提供各种帮助你购买产品的决定。

This model provides the theoretical foundation for air route programming and its improvement, as well as aircraft flow control.

此模型为航线规划、改进与完善以及飞行流量管制提供了理论依据。

Convenient sea, land and air transportation network for the development of tourism provides a reliable guarantee.

便捷的海、陆、空交通网为旅游事业的发展提供了可靠的保证。

The invention provides a hovercraft base on air fin balance wing.

本发明提供的是一种基于空气减摇平衡翼的气垫船。

This work provides reliable experimental basis for designing a new generation aircrew helmet.

为设计新一代航空头盔提供了可靠的实验依据。

It provides total transport and forwarding services including ocean freight, airfreight, land transport and logistics management.

基业全运有限公司于一九九一年成立，是一家专营全球海运、空运、陆运及物流管理业务的国际运输机构。

Using an airgun as a repeatable seismic source and recording the data at a fixed point, the variation of shear wave splitting parameters can indicate the variation of local stress-strain fields, and hence provides a method for earthquake stress-forecasting.

气枪是高度可重复性人工震源，利用气枪定点激发和定点接收有可能精确获取S波分裂参数随时间的变化规律，为地震预测探索实践提供可靠的物理途径。

This article carries on the comparison between several kinds of airproof material which are commonly used and describe experimental shaping of the concrete product, it provides factories and the models of the part commonly used products.

本文对常用的几种密封材料进行了比较，并就具体产品的试验选型进行了描述，提供了部分常用产品的厂家和型号。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。