在1999年召开的“中国’99昆明世界园艺博览会”上，人们将看到一座巨型花坛钟，这座被命名为“世纪花坛”的巨型钟是上海市人民政府赠送给大会的礼物。近期，该钟的研制单位--上海中国钟厂已把此礼物送往昆明实地安装。“世纪花坛”钟直径为19．99米，钟面面积313．9平方米，是目前国 At the “China ’99 Kunming World Horticultural Exposition” held in 1999, people will see a giant flower-bed bell, which is named after “Century Flower Bed” and presented to the General Assembly by the Shanghai Municipal People’s Government gift. Recently, the bell’s development unit - Shanghai China Clock Factory has sent this gift to Kunming field installation. “Century flower bed ” clock diameter of 19.99 meters, clock surface area of ​​313.9 square meters, is the current country