This indicator reflects the investment result from the perspective of the speed of construction. 该指标从房屋建筑施工速度的角度反映投资效果的指标。
The best time to install is during the construction or remodeling phase of your home.Water lines can then easily be installed behind the drywall and out of sight. 安装系统的最佳时刻是在房屋建筑初期或装修期间，因水管可轻易地装于墙板内而不用外露。
