For example, the linear feet of piping installed can be compared to the required amount of piping to estimate the percentage of pipingwork completed.
例如，将已安装的直线管道和须要装置的管道数量进行比拟便可测算出已完工管道劳动量的百分比。
3
Furthermore, operators had to prefinance the subsidies, that is, they were required to complete the pipingwork before being reimbursed, thus giving all parties incentives to perform.