封顶仪式 meaning in English

top ping-out ceremony

Has the tower been topped off yet
塔楼举行封顶仪式了吗？
When we top out , there will be beer for everyone who has worked on the site
举行封顶仪式时，将以啤酒招待所有在工地上工作过的人。
On the morning of september 25th , the ceremony for the roof - sealing of peking university innovation center was held at pku science park
9月25日，北大科技园举行了简单而庄重的创新中心工程结构封顶仪式，标志着北大科技园创新中心工程进入二次结构及装修阶段。
Speech by the permanent secretary for economic development and labour labour , mr matthew cheung kin - chung , at the 7th international congress on work injuries prevention , rehabilitation and compensation and the tsuen wan safe community designation ceremony on june 27 , 2006
保安局局长李少光在深圳湾口岸旅检大楼封顶仪式的致辞全文二月二十七日保安局局长李少光主持亚洲消防国际会议2006开幕典礼时的致辞全文二月十五日