In addition, upper extreme of the pump body is permanently provided with a hanging ring device; bottoms of the pump end shell cover and of the back cover are provided with adsorption devices. 另外在泵体上端固定有提手装置,且在泵端盖、后盖的底部设置有吸附装置。
The upper nest is connected to the upper end of umbrella column; the middle and lower nests cover umbrella column. 上巢固定连接在伞柱的上端、中巢和下巢空套在伞柱上。