The passive crossover network features a thermal protection system on the HF section providing audibly transparent protection for the compression driver.
被动分频网络功能，对热防护系统高频部分提供出声透明的压缩驱动程序的保护。
Abstract: it describes the performance of HF-proof mastic and gives an example for its application in retention tower of gas cleaning section of acid-making with smelting gas.
文摘：介绍了耐hf酸胶泥的性能及其在有色冶炼厂烟气制酸净化工段空塔上的应用实例。
Objective To compare two methods of section making and to detect the apoptosis on human hair follicle(HF) in vitro.
目的对人头皮游离毛囊（HF）切片制作及凋亡检测方法进行比较。
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