Objective To evaluate the necessary of peripheral iridectomy ( PI ) in cataract extraction and trabeculectomy surgeries.目的探讨周边虹膜 切除 术在白内障合并青光眼联合手术中的必要性....
In order to calcine calcium carbonate fines, the technique of high - temperature pelletization has successfully been used.为了煅烧碳酸钙细粉, 已经成功地应用了高温成球技术.In leaching stage the zinc oxide is separated from the calcine s.在浸出阶段氧化...