The complex surface active agents with success applied in chemical cleaning of dowthem scales in heating casing of ball valve in PTA plant was presented.
采用复合表面活性剂对PTA装置球阀加热夹套热媒垢成功地进行了化学清洗。
2
The utility model relates to a water purifier with automatically cleaning filter element, which is mainly composed of a casing, a filtering element, a rotation device, a rolling brush cylinder, etc.
一种滤心自动清洗净水器，主要由外壳、过滤心、旋转器和滚刷筒等构成；
3
There are self-cleaning devices on the disk, scraping sludge attaching on rotating axis and casing through tray rotating.