他告诉大家要使用天花板上垂下的救生索，那是一条穿有木质球果的绳子，类似游泳池内的浮标。
He said to use the lifeline running along the ceiling, a slender rope threaded through wooden cones, like floats in a swimming pool.
如果您想提高您的混凝土板在天井，车道，人行道的游泳池和你的房子，有很多技术可用。
If you want to improve your concrete slab around the patios, driveways, pools and walkways of your house, there are numerous techniques available.
太阳能电池板可全年加热水和游泳池，倾斜的窗户允许每个房间的交叉通风和自然采光。
Solar panels heat the water and the pool throughout the year and tilting windows allow cross ventilation and natural light in every room.
应用推荐