按给定水头发电
generate on set water head
保压水头
head of water preserving pressure
变水头边界
variable water head boundary
变水头渗透试验
falling head permeability test
变水头透水试验
falling head permeability test
标准大气水头
standard atmospheric head
标准气压水头
standard atmospheric head
测压管水头线
piezometer tube water head line
常水头渗透试验
constant head permeability test