backsurge disc valve 反冲洗圆盘阀 ; 反冲刷圆盘阀

backsurge tool 反冲洗井工具 ; 反冲洗工具

backsurge volume 反冲液量

backsurge tool stringer 反冲工具尾管

backsurge chamber volume 反冲洗工具的低压室体积

backsurge e disc valve 反冲洗圆盘阀

backsurge e 回压冲洗

backsurge aggregate 反冲液量