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...
Forward handspring has great potentialities in its development among the forward somersault movements in floor exercises.前手翻在自由体操前空翻类动作发展方面具有较大的潜力.The breathtaking potentialities of mechanization set the minds of manufac...
全国托管协会是个已注册的慈善机构。The National Trust is a registered charity.这都是堂堂立案注册的学校,自己万万比不上.All these were formally accredited and registered schools with which he could never hope to compete.申请注册的商标由商标局审查, 初步审定后,予以公告.It examines t...