The new technology for the preparation of cryolite from fluosilicic acid and ammonium hydrocarbonate is introduced.

Hydrocarbons ( HC ), like carbon monoxide, represent unburned and wasted fuel.

碳氢化合物 ( HC ) 像一氧化碳一样, 为未燃尽的和被浪费掉的燃料.

Cracking involves the chemical breakdown of higher, less volatile hydrocarbons into smaller molecules.

裂化是使较重的低挥发性的碳氢化合物分裂成较小分子的化学分裂.

A large number of hydrocarbons such as benzopyrene are also mutagenic.

大量碳氢化合物如苯并芘也是诱变剂.

Hydrocarbons are molecules containing only hydrogen and carbon atoms.

碳氢化合物是只含碳原子和氢原子的分子.

Hydrocarbons are among the most important organic compounds.

烃是一类最重要的有机化合物.

The beds, rich in organic material from which hydrocarbons originated , are called source beds.

富含能够产生碳氢化合物的有机物质的地层叫做生油层.

CONCLUSION Its a simple and safe method to treat the hydrocele.

结论该方法创伤小,简单安全,手术疗效确切值得推广应用.

The head circumference increases significantly secondary to obstructive hydrocephalus.

患儿在阻塞性脑积水发生后头围显著增大.

CT MANIFESTATION OF EXTERNAL HYDROCEPHALUS ( ADDED TO 31 CASES REPORTS )

脑外脑积水的CT表现 ( 附31例报告 )

Objective To study pathogeny and treatment of traumatic hydrocephalus.

目的了解外伤性脑积水的病因及治疗方法.

Objective To investigate the nursing experience in ventriculoperitoneal shunt for hydrocephalus assisted with ventriculoscope.

目的探讨脑室镜辅助下脑室—腹腔分流术治疗脑积水的手术护理配合要点.

To investigate the diagnosis and treatment of hydrocephalus after moderate and severe brain injury.

探讨中、重型脑外伤后脑积水的诊断和治疗方法.

Purpose : To explore CT features of external hydrocephalus ( EH ).

探讨外部性脑积水 ( EH ) 的ct征象.

Objective To explore the results of surgical treatment of normal pressure hydrocephalus with ventriculoperitoneal shunt.

目的探讨正常压力脑积水的手术治疗.

Objective To evaluate CT diagnosis and clinical appli-cation in external hydrocephalus ( EH ).

目的探讨外部性脑积水 ( EH ) 的CT特征及临床应用价值.

Objective To make a further study of MRI and clinical application in external hydrocephalus ( EH ).

目的:进一步探讨外部性脑积水 ( eh ) MRI特征及临床应用价值.

Objective : To discuss the prevention of the delayed hydrocephalus from intraventricular hemorrhage.

目的: 探讨脑室出血后延期性脑积水的预防.

Methods Hydrochloric acid ambroxol was applied to treat 49 premature with pneumonia.

方法应用盐酸氨溴索针剂治疗49例早产儿肺炎患儿.

Hydrochloric and sulfuric acids are called inorganic substances.

盐酸和硫磺酸被称作无机物.

Gold can't be dissolved in hydrochloric acid.

黄金不会溶解于盐酸之中.