above ground installation meaning in English

管材地上铺设

The installation of pig receiver & launcher is divided into above ground installation and underground installation
收发球筒安装分地面安装及地下安装两种形式。
For above ground installation , the receiver & launcher shall be horizontal , which center is about 1m high from ground , and shall be connected to underground pipe by nozzle stub and bend but not skewed crossing connection
地面时，收发球筒为卧式，中心距地面高度一般为1米左右，通过短管及弯管与地下管线连接，不宜采取斜交叉连接。
For above ground installation , the receiver & launcher shall be horizontal , which center is about 1m high from ground , and shall be connected to underground pipe by nozzle stub and bend but not skewed crossing connection
地面安装时，收发球筒为卧式，中心距地面高度一般为1米左右，通过短管及弯管与地下管线连接，不宜采取斜交叉连接。