自压软管
Gravitational flexible hose
gravity flexible hose
测压管水头线
piezometer tube water head line
液压软管压制机安装
hydraulic hose press arrangement
液压软管压制机组件
hydraulic hose press group
各人自管自
Let every tub stand on its own bottom
水头自动跟踪
water head antomatic tracking
水压自控机
hydraulic automatic control machine
微压自控
auto control of micro pressure
自压管灌
pipe irrigation with water diversion by gravity
保压水头
head of water preserving pressure
标准气压水头
standard atmospheric head