Finally the structures were released in a 49 % HF etch.最后在49%F中腐蚀形成这些结构.More often , all of the materials etchant have a finite etch rate.剂中的材料都具有一定的刻蚀速率.Can some one suggest a suitable etch or sequence of etches to achi...
More often, all of the materials exposed to the etchant have a finite etch rate.通常, 所有暴露在刻蚀剂中的材料都具有一定的刻蚀速率.Hydrofluoric acid of Porcelain Etchant and phosphoric acid of UNI - ETCH are severe eye and tissue irritants.瓷酸蚀剂...
With access to the satellite TV, most Iranians are well informed.由于可以收看到卫星转播的电视, 大多数伊朗人都知晓时事.But how many Iranians see their regime that way?但是伊朗人自己怎么看 呢 ?Young Iranians may grumble, wear jeans, drink Pepsi and watch foo...