1·方法：对1180颗金属烤瓷冠在修复后半年至8年进行复查。
Methods: 1180 Cases were observed after half to 8 years restoration, including gingival color, gingival index( GI), depth of probing.
2·9月9日从杭集传来喜讯，总长度1180米的污水管道已成功从廖家沟河底穿过。
September 9 Hang set came from good news, the total length of 1180 meters of sewage pipelines have been successfully crossed from the Liao River Formation.