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...
Last year 400,000 acres of land yielded a crop worth $1.75 billion.去年40万英亩的土地产值达17.5亿美元。It yielded a profit of at least $36 million.它带来了至少3,600万美元的收益。His trip to Melbourne had yielded a lot of information.他的墨尔本之行让他大开眼界。...
She served two years in prison for theft.她因偷窃服了两年刑。...the theft of classified documents from a car in London.从伦敦一辆汽车里盗走机密文件...allegations of theft, forgery and false accounting.盗窃、伪造和做假账的指控a device to immobilize the car ...