3.给排水工程:由于方案设计的深度不可能太细,因此其投资估算多数是套用类似工程每平方米经济指标计算,换算也比较困难,只能酌情调整。如方案设计有平面布置图,可以首先列出卫生洁具等的数量并套上相应的单价(包括安装费),再摊算每件器具的支立管造价(一般工程的浴缸、脸盆、大 3. Water Supply and Drainage Projects: Since the depth of scheme design cannot be too fine, most of its investment estimates are based on the calculation of economic indicators per square meter for similar projects. The conversion is also difficult and can only be adjusted as appropriate. If the plan design has a plan layout, the number of sanitary wares, etc. may be listed first and the corresponding unit price (including the installation fee) may be put up, and then the stand pipe cost for each piece of equipment may be calculated (bathtub, washbasin, large