umbrella(-shaped) roof是什么意思

用法例句

Placement of umbellate silicagel lacrimal stent performed in treatment of chronic dacryocystitis;

伞形泪道支架治疗慢性泪囊炎126例

It is same body type,sleam box type,chimney smoke synthetical clean processor,with three umbrella-water-screensand continuous working.

提出并论述了冲天炉洁玉烟气净化处理(器)系统,它是同体式、笼屉式三级伞形水幕并连续作业的烟气综合净化装置,其上有可高可低的器上烟囱,其下有余热锅炉;它集除尘、除微粒、除有害气体和降温于一体,足以实现常温无污染排放;它不仅适用于冲天炉和其他竖炉,而且还可以普遍推广到一切工业烟囱。

Study on Antioxidation of Umbelliferae Chinese Herbs;

13种伞形科中药抗氧化能力研究

Wild Umbelliferae Chinese Herb Medicinal Plant Resources and Evaluation in Taihang Mountain Area of Henan Province;

河南太行山区野生伞形科中草药植物资源与开发利用