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...
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...
...a brief but poignant epistle.简短却深深打动人的书信He longed to put a little affection into his epistle.他渴望在信里流露出点爱慕之情.A reference to " natural law " can be found in the Epistle of Paul to the Romans.在圣保罗致罗马人的使徒书信中就已论及了 “ 自然法 ”....