浮件 meaning in Chinese

parts lift

After stiff competition from the competing finalists , shau kei wan government secondary school took first place . the winning team had to complete two tasks in 25 minutes . the students first had to place a carton into another carton that was held under the water , and then use a robotic arm to release the key to an underwater buoy , making it a float to the surface
各参赛队伍须于限时25分钟内将机械人由岸上遥控至水底，并完成两项任务测试： 1将放在泳池边的胶箱搬往水底，并将之放进水底的另一个胶箱内2利用机械人手臂拉开预先放在水底之装置上的钥匙，使其浮件浮到水面。